Question

Uprość wyrażenia:

a) 5x(2x-3y)-(3x-2y)²

b) (2√2+4x)(4x-2√2)-2(2x-¼)²

Answer 1

a) 10x^(2 )- 15xy- (9x^2- 12xy+4y^2 )=10x^(2 )- 15xy- 9x^2+12xy-4y^2=x^2 - 3xy-4y^2

b) 16 x^2-8-2(4x^2- 1+ 1/16)=16 x^2-8-8x^2+2-1/8=8x^2-61/8