Question

WYKONAJ MNOŻENIA I PRZEDSTAW WYNIK W NAJPROSTSZEJ POSTACI:
a) (2x+y)(x+3y)
b) (2x+y)(x-3y)
c) (3x+2y)(x-y)
d) (4x-3y)(2x+y)
e) (4a-5b)(2b+3a)
f) (6a-2b)(3b-5a)

Answer 1

A)(2x+y)(x+3y)= 2x^2+6xy+xy+3y^2=2x^2 + 3y^2 +7xy

b)(2x+y)(x-3y)=2x^2-6xy+xy-3y^2= -3y^2+2x^2-5xy

c)(3x+2y)(x-y)=3x^2-3xy+2xy-2y^2= -2y^2+3x^2-xy

d)(4x-3y)(2x+y)=8x^2+4xy-6xy-3y^2= -3y^2+8x^2-2xy

e)(4a-5b)(2b+3a)=8ab+12a^2-10b^2-15ab= 12a^2- 10b^2 -7ab

f)(6a-2b)(3b-5a)=18ab-30a^2-6b^2+10ab=28ab -30a^2-6b^2