Question

25. Use identity, evaluate: (6x – 7) (6x + 7).​

Answer 1

Answer:

$As \: this \: is \\ </p><p>(a-b) (a+b) \\ </p><p>where \: a=6x , b=7 \\ </p><p>WE \: KNOW \: THAT \:$

$x ^{2} - y {}^{2} = (x - y)(x + y) \\ 6x { }^{2} - 7 { }^{2} \\ 36x {}^{2} - 49$