Question

Factor completely 3x4 – 30x3 + 75x2

3(x – 5)2

3x2(x – 5)2

3x2(x2 – 10x + 25)

3x2(x + 5)(x – 5)

Answer 1

the 2's are exponents fyi

Answer 2

you take the GCF out of brackets : = 3x^2

Answer 3

whats left after dividing by GCF = x^2 – 10x + 25

but can this be factored ?

Answer 4

idk O.o

Answer 5

x^2 – 10x + 25
- to factor this we need 2 numbers a and b where ab = + 25 and a + b = -10

these are (same number in this case) -5 and -5

so we get (x - 5)(x - 5) = (x - 5)^2

Answer 6

thanks for clear explanation!

Answer 7

so which choice is the correct one?

Answer 8

B right?

Answer 9

yw

Answer 10

3x²(x - 5)²

Answer 11

answer^

Answer 12

yes