pomózcie mi błągam
a)3(4x-5y)+2(4y-6x)
b)6(5a-4b)-3(a-8b)
c)jedna druga(-6y kwadratu- 9)-jedna piąta (10ykwadratu+5)
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a) 3( 4x-5y) +2 (4y- 6x)= 12x - 15y +8y - 12x = - 7y
b) 6(5a - 4b) -3(a- 8b) = 30a - 24b -3a + 24b = 27a
c) 1/2(-6y kw - 9) -1/5(10x kw +5)= - 3y kw- 4,5-2x kw - 1 = - 3y kw - 2x kw - 5,5
a) 3(4x-5y) + 2(4y-6x) = 12x - 15y + 8y-12x= -7y
b) 6(5a-4b) -3(a-8b) = 30a-24b-3a+24b= 27a
c)1/2(-6y x -6y - 9)- 1/5( 10y x 10y +5 )= -3y x -3y -4,5 - 2y x 2y +1= 9y- 4,5 -4y +1= 5y- 3,5