Question

Opuść nawiasy i zredukuj wyrazy podobne : a) (6x-4y)-(-2x+6)= b) 2(8x+9)= c)7(3a-2b)+4(a+3b)-(6-a)= d)(2x+3)(x-4)= e)4(y+2)^ +2(6-y)^=

Answer 1

a)6x-4y+2x-6y=8x-10y

b)16x+18

c)21a-14b+4a+12b-6+a=26a-2b-6

d)2x^{2}-8x+3x-12=2x^{2}-5x-12

e)4(y^{2}+4)+2(36-y^{2})=4y^{2}+16+72-2y^{2}=2y^{2}+88

 

b. prosze ;)

Answer 2

a) (6x-4y)-(-2x+6)=6x - 4y + 2x - 6 = 8x - 4y - 6

b) 2(8x+9)=16x+18

c)7(3a-2b)+4(a+3b)-(6-a)=21a - 14b + 4a + 12b - 6 + a = 26a - 2b - 6

d)(2x+3)(x-4)=2x²-8x+3x-12=2x²-5x-12

e)4(y+2)² +2(6-y)²=4(y²+4y+4) + 2 (36-12y+y²) = 4y² + 16y + 16 + 72 - 24y + 2y²=6y² -8y+88