Question

Matematyka z plusem 2
zad.1e str.82
e)(x-y)(a-b+9)

zad.2 str.82
a)(x+1)(x+2)
b)(3a+4)(a-5)
c)(2t+1)(1-3t)
d)(3ab-7)(3-7ab)
e)(-x+y)(5x+6y)
f)(x+5y)(7x-y)
g)(2x do potęgi 4-y)(x do potęgi 4-y)
h)(ab-a)(2ab+6a)

Answer 1

E/(x-y)(a-b+9)=ax-ay-bx+by+9x-9y
a/=x²+2x+x+3=3x+x²+3
b/=3a²-15a+4a-20=3a²-11a-20
c/=2t-6t²+1-3t= -t-6t²+1
d/=9ab-21ab²-21-49ab
e/=-5x²-6xy+5xy+6y²= -5x²-xy+6y²
f/=7x²-xy+35xy+5y²=7x²+34xy+5y²
g/=2xdo pot. 8 +2xdo pot.4y-xdo pot.4y-y²= 2xdo 8+x do 4- y²
h/=2ab²-8a²b-6a

Answer 2

A)(x+1)(x+2)= x²+3x+2b) (3a+4)(a-5)=3a²-11a-20c) (2t+1)(1-3t)=-t+6t²+1d)(3ab-7)(3-7ab)=-21a²b²-21+58abe)(-x+y)(5x+6y)=-5x²-xy+6y²f)(x+5y)(7x-y)=2x²-xy+35xyg)(2x⁴-y)(x⁴+y)=2x(do poteki 8)+x(do 4)y-y²h)(ab-a)(2ab+6a)=2a²b²+4a²b-6a