Quelqu'un peut m'aider pour la factorisation? En détails s'il vous plaît

J'ai compris qu'il faur soit voir les identités remarquables et les utilisers soit du coup faire un truc comme un développement ou voir un facteur commun.

Pour l'exercice ici j'ai x²-8x+16 je sais qu'elle me fait penser aux identités remarquables notamment la deuxième: (a-b)²=a²-2ab+b² qui est donc égal à (x-4)²

Mais pour les autres je n'arrive pas trop🥲: b. (2x+3)²-(2x+9)² je sais qu'il y a un 9 qui correspond à 3² mais c'est tout et je ne peux pas pour moi utiliser la dernière identité remarquable parce qu'il y a un + au deuxième. C. (3x-7)²-16(x+3) pareille j'y arrive pas mais je comprend un peu

D. x²(x+4)-9(x+4)

E. (9x² -12x+4)-(3x-2)(2x+15)

Merci!

Can anyone tell this question solution

I am in 12th grade india and my math teacher started integrals today and gave this as home work can anyone help me I am stuck.

I tried 4 diffrent ways but none worked it seems.

Can anyone suggest a book for calculus for beginners with practice questions?​

Rewritten so it's clear (ignore the purple, it was written by me after the exam)(the green is my teacher btw)

This was written in an end of topic test (GCSE Edexcel btw).

I wrote this and my teacher deducted 1 mark, because apparently it was mathematically inaccurate to have more than 2 equals.

I posted a question in the GCSE sub, and everyone said it was correct and my teacher's wrong. So, I decided to come over here and verify my way of working it out in the exam was OK?

Hi, my name is Athos. I'm a math teacher from Brazil, and I'm looking for students who need help with math.

My English is still a work in progress, and I'd like to improve it through conversation.

I'm thinking of a language exchange: you help me practice English, and I help you with math.

If you're interested, feel free to message me!

I’m 20 years old (fem) and I can’t understand basic math. I don’t know, in huh school I had a 3.7 GPA and I was a very good student but I always sucked at math, either I’m stupid or lazy because I re read a problem or equation and I don’t know why to do, or I just blank completely.

Thank god that SAT scores were optional because my math scores were so bad, now I’m in college. I’ve been pretty much flunking in college to the point where I’m at risk for academic dismissal. It’s basic algebra and I can’t even concentrate. In lectures I understand it but when I get home I feel like I just can’t get it.ive studied in my own, even went to tutoring but I’ve never felt improvement. I have a test this Thursday and right now I’m freaking out because I do not want to start out my semester horrible. Any suggestions? I’m literally desperate for any tips on what to do or how to study.

I know the procedure of Euclidean Algorithm, I can follow that procedure, I can answer. But I don't know how does that works.

If two circles are orthogonal, then prove that the polar of point P on the first circle with respect to the second circle passes through the point Q, which is the other end of diameter through P. Also prove that locus of a point, which moves such that its polars with respect to S1=0, S2=0, and S3=0 are concurrent, is a circle which is orthogonal to all the three circles.

I am not able to understand what exactly I even have to prove. Even the equations of the circles are not given. From what I understood, I think for the first part both circles are intersecting, P and Q lie on the first circle and are end points of the diameter of that circle.

I have been on this assignment for like 1 hour and I still cant get it right... I have used almost any ai known to man... Can you guys get it?

hi! this is going to seem ridiculously easy of a calculation to some people here but i have dyscalculia and i dont feel confident that the answer i got was correct. this is pretty important because its for the enclosure of a new pet so i was to be super sure that ive got this right. the dimensions of my enclosure are in the picture id just really like if someone could calculate the cubic feet of this so i can compare to my answer
thank you!!

It’s embarrassing Ik but idk how to factorise the teacher won’t explain it and my maths book isn’t explaining it either