Question

Упростить: а) (x-3)(x+4)-(x+6)(x-5) б) (x+6)(2-y)-(9+y)(5-y)

Answer 1

а)

(x-3)(x+4) - (x+6)(x-5)  =

= х²+4х-3х-12 - х²+5х-6х+30 = 30 - 12 = 18,

б)

(у+6)(2-y) - (9+y)(5-y) =

= 2у-у²+12-6у - 45+9у-5у+у² = 12 - 45 = -33

Answer 2

Ответ:

Фото прикреплено.

~•~•~•ZLOY_TIGROVSKIY~•~•~•

Answer 3

а)

(x-3)(x+4)-(x+6)(x-5)

= x^2 +4x -3x -12 - x^2 +5x +6x -30

= -x - 36

б)

(x+6)(2-y)-(9+y)(5-y)

= 2x + 12 - xy -6y -45 +9y +5y - y^2

= 2x - xy - y^2 - y - 33