Question

solve using identity : (x + 7) (x-7)​

Answer 1

Answer:

$x {}^{2} - 7 {}^{2} \\ = x {}^{2} - 49 \\ = x {}^{2} = 49 \\ = x = \sqrt{49} \\ x = 7$

Step-by-step explanation:

7

Answer 2

Step-by-step explanation:

(×+7)(×-7)=(a+b)(a-b)

$a { }^{2} + b {}^{2}$

$x {}^{2} + 7 {}^{2}$

$x { }^{2} + 49$