Question

Multiply these binomials.

(4x - 5)(4x + 5)

Answer 1

This is actually related to an identity.

\(\Large \color{MidnightBlue}{\Rightarrow (a + b)(a - b) = a^2 - b^2 }\)

Answer 2

Note that (a + b)(a - b) and (a - b)(a + b ) are the same, either ways.

Answer 3

Parth is right. So what would you do to proceed?

Answer 4

16x2 + 25

Answer 5

Commutative property of multiplication.

Answer 6

Nope, you got the sign wrong.

Answer 7

16x2 - 25

Answer 8

Yeah, correct. :D

Answer 9

That's right!!