Question

factor 63 a square - 112 b square​

Answer 1

here,

there is no square root of 63 and 112.

so,

we must take the common number such as;

(3×3×7×a×a)-(2×2×2×2×7×b×b)

Taking the common factor

we will get,

7(9a^2-16b^2)=7(3a^2-4b^2)

and the answer will be

7(3a-4b)(3a+4b)