Question

1.Wykonaj działania .

a)(2x-3)-(x+5)+(x-4)

b)(3a-2)-(a+4)+(a-3)

c)4(2y-7y do kwadratu)-3(y do kawadratu -3y)

d)-5(2b+3z)+2(2b-4z)

Answer 1

a)(2x-3)-(x+5)+(x-4) =2x-3-x-5+x-4=2x-12

b)(3a-2)-(a+4)+(a-3)=3a-2-a-4+a-3=3a-9

c)4(2y-7y do kwadratu)-3(y do kawadratu -3y)=4(4y^2-28y^2+49y^2)-3y^2+9y=

16y^2-114y^2+196y^2-3y^2+9y=190y^2+9y

d)-5(2b+3z)+2(2b-4z)=-10b-15z+4b-8z=-6b-23z

Answer 2

a) 2x-3-x-5+x-4=2x-12

b) 3a-2-a-4+a-3=3a-9

c)8y-28y^2-3y^2+9y=17y-31y^2

d)-10b-15z+4b-8z=-6b-23z