Question

Realiza las siguientes multiplicaciones
A) (3m+2n) (4m-5n)
B) (4ab+3) (2ab-5)
C) (3x2-xy+5y2) (2x-3y)
D) (5a+2b) (3a-4b)
E) 2a2+3a-5) (4a+7)

AYUDA URGENTE PORFA

Answer 1

(3m+2n)(4m−5n)

=(3m+2n)(4m+−5n)

=(3m)(4m)+(3m)(−5n)+(2n)(4m)+(2n)(−5n)

=12m2−15mn+8mn−10n2

=12m2−7mn−10n2

(4ab+3)(2ab−5)

=(4ab+3)(2ab+−5)

=(4ab)(2ab)+(4ab)(−5)+(3)(2ab)+(3)(−5)

=8a2b2−20ab+6ab−15

=8a2b2−14ab−15

(3x2−xy+5y2)(2x−3y)

=(3x2+−xy+5y2)(2x+−3y)

=(3x2)(2x)+(3x2)(−3y)+(−xy)(2x)+(−xy)(−3y)+(5y2)(2x)+(5y2)(−3y)

=6x3−9x2y−2x2y+3xy2+10xy2−15y3

=6x3−11x2y+13xy2−15y3

(5a+2b)(3a−4b)

=(5a+2b)(3a+−4b)

=(5a)(3a)+(5a)(−4b)+(2b)(3a)+(2b)(−4b)

=15a2−20ab+6ab−8b2

=15a2−14ab−8b2

(2a2+3a−5)(4a+7)

=(2a2+3a+−5)(4a+7)

=(2a2)(4a)+(2a2)(7)+(3a)(4a)+(3a)(7)+(−5)(4a)+(−5)(7)

=8a3+14a2+12a2+21a−20a−35

=8a3+26a2+a−35