Question

Expand.If necessary, combine like terms.(2+7x)(2-7x)stuck? Watch a vide​

Answer 1

Answer:4-49x^2

Step-by-step explanation:

2^2-(7x)^2= given ans

Answer 2

Answer:

$\boxed{\bold{-49x^2+4}}$

Explanation:

Apply Difference of Two Squares Formula: $\bold{\left(a+b\right)\left(a-b\right)=a^2-b^2}$

$\bold{a=2,\:b=7x}$

= $\bold{2^2-\left(7x\right)^2}$

Simplify $\bold{2^2-\left(7x\right)^2: \ -49x^2+4}$

$\boxed{\bold{-49x^2+4}}$