(4x-5)2-3(2x-3)(5-x)

Question

(4x-5)2-3(2x-3)(5-x)

Answer 1

=8x-10+(-6x+9)(5-x)=8x-10-30x+6+45-9x=-31x+35+6

Answer 2

4x×2-5×2+(-3×2x-3-3×(-3))×(5-x)
8x-10+(-6x+9)×(5-x)
8x-10-30x+6x^2+45-9x
-31x+35+6x^2