Question

factorise :- (ax + by)² + (bx - 9y)²
In details with formula = a² + 2ab + b²​

Answer 1

Step-by-step explanation:

(ax+by)²+(bx-9y)²

=(ax)²+2(ax)(by)+(by)²+(bx)²-2(bx)(9y)+(9y)²

=a²x²+2abxy+b²y²+b²x²-18bxy+81y²

=a²x²+b²x²-2abxy-18bxy+b²y²+81y²

=x²(a²+b²)-2bxy(a-9)+y²(b²+81)