Question

Is the following problem simplified correctly? (5x+7)(5x-7)=25x^2+70x-49

Yes or no?

Answer 1

I Think it is

Answer 2

no

Answer 3

This is a lot more easier to do than you think hehe.

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

Answer 4

\( \color{Black}{\Rightarrow (5x)^2 - (7)^2 }\)
Can you simplify this?

Answer 5

\[\huge{(5x+7)(5x-7) = (5x)^2-7^2 = 25x^2-49}\]

Answer 6

\( \color{Black}{\Rightarrow (5x)(5x) - (7)(7) }\)

Answer 7

just apply the identity that master parth kohli told you

Answer 8

Looks like you got the answer right there

Answer 9

So you both told me my answer was wrong that means its not simplified correctly. is that what your saying?