Question

раскройте скобки:(x+2)(x-5)-3x(1-2x)

Answer 1

(x+2)(x-5)-3x(1-2x)=х^2-3х-10-3х+6х^2=

=7х^2-6х-10

Answer 2

$(x + 2) \times (x - 5) - 3 \times (1 - 2x) \\ x ^{2} - 5x + 2x - 10 - 3x \times (1 - 2x) \\ x^{2} - 5x + 2x - 10 - 3x + 6x ^{2} \\ 7x ^{2} - 5x + 2x - 10 - 3x \\ 7x ^{2} - 6x - 10$