Question

pls help, will give out medal

Which polynomial can be simplified to a difference of squares?

a) 10a^2 + 3a – 3a – 16
b) 16a^2 – 4a + 4a – 1
c) 25a^2 + 6a – 6a + 36
d) 24a^2 – 9a + 9a + 4

Answer 1

a, b, c, or d?

Answer 2

difference of squares formula
\[(a^2-b^2)=(a+b)(a-b) \]
look for perfect square numbers
4,9,16,25,36,49.... all examples of perfect squares

Answer 3

so its b?

Answer 4

simplify it further
16a^2 – 4a + 4a – 1

Answer 5

what is the square root of 16?
what is the square root of 1
what's -4a+4a ?

Answer 6

(4a-1)(4a+1)

Answer 7

yup

Answer 8

tnx