could someone you is good at math help me?

Question

5x^2+30+40

4x^5+32x^2

45Y^2-6y-3

X^3-25X

Answer 1

Hi,
Next time if you would say what you want to do with your problems, we could be more sure that we are giving a relevant answer. I'll assume you want to factorize them.
a) 5x² +30+40
5x²+70
5(x²+14)

On the other hand, if you intended this problem to be this:
5x² +30x+40
Then the solution is this:
5x² +30x+40
5(x²+6x+8)
5(x+4)(x+2)

b) 4x^5+32x^2
4x²(x^3+8)
=4x²((x+2)(2x²-2x+4)

c) 45Y^2-6y-3
3(15y-2y-1)
3(3y-1)(5y+1)

d) X^3-25X
x(x²-25)
x(x-5)(x+5)

FE