Question

Wykonaj mnożenie i zredukuj wyrazy podobne ,

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)(2x⁴-y)(x⁴+y)=

h) (ab-a)(2ab+6a)=

Answer 1

a) (x+1)(x+2)=x²+2x+x+2=x²+3x+2

b) (3a+4)(a-5)=3a²-15a+4a-20=3a²-11a-20

c) (2t+1)(1-3t)=2t-6t²+1-3t=1-6t²-t

d) (3ab-7)(3-7ab)=9ab-21a²b²-21+49ab=58ab-21-21a²b²

e) (-x+y)(5x+6y)=-5x²-6xy+5xy+6y²=6y²-5x²-xy

f)  (x+5y)(7x-y)=7x²-xy+35xy-5y²=7x²+34xy-5y²

g) (2x⁴-y)(x⁴+y)=2x⁸+2x⁴y-x⁴y-y²=2x⁸+x⁴y-y²

h) (ab-a)(2ab+6a)=2a²b²+6a²b-2a²b-6a²=2a²b²+4a²b-6a²