Question

factorise 49 x^2-56xy+16y^2 using suitable identity

Answer 1

49 x^2-56xy+16y^2 this is in the form of
a + b whole square =a square - 2 a b + b square
49+16 whole square

Answer 2

$49x {}^{2} - 56xy + 16y {}^{2} \\ (7x) {}^{2} - 2(7x)(4y) + (4y) {}^{2} \\( 7x - 4y) {}^{2} \\( 7x - 4y)(7x - 4y)$
this is answer of the question