Question

pomocy!!!!rozwiąż:

a)2[a-2b-5(3b-4a)]-(a-b)

b)(2a-3b+1)(8a+b)+9(a-5)

c)5x(2-7x)-(3x+4)2x

d)6(2-y)(5x+y)+3(x+y)(x-8)

Answer 1

a) 2[a-2b-5(3b-4a)]-(a-b)=2(a-2b-15b+20a)-(a-b)=2a-4b-30b+40a-a+b=41a-33b

b)(2a-3b+1)(8a+b)+9(a-5)=16a²+2ab-24ab-3b²+8a+b+9a-45=16a²-3b²-22ab+17a+b-45=

c)5x(2-7x)-(3x+4)2x=10x-35x²-6x²-8x=-41x²+2x

d)6(2-y)(5x+y)+3(x+y)(x-8)=6(10x+2y-5xy-y²)+3(x²-8x+xy-8y)=60x+12y-30xy-6y²+3x²-24x+3xy-24y=3x²-6y²+36x-12y+33xy

Answer 2

a) 2[a-2b-5(3b-4a)]-(a-b)=2[a-2b-15b+20a]-a+b=2a+4b+30b+40a-a+b=41a+35b

b) (2a-3b+1)(8a+b)+9(a-5)=16a²+2ab-24ab+8a+b+9a-45=16a²-22ab+17a+b-45

c) 5x(2-7x)-(3x+a)2x=5x(-2+7x)(6x²+2xa)=5x(12x²+4xa+42x³+14x²a)=60x³+20x²a+210x do potegi czwartej+70x³a

d) 6(2-y)(5x-y)+3(x+y)(x-8)=6(10x+2y-5xy-y²)+3(x²-8x+xy-8y)=60x+12y+30xy+6y²+3x²-24x+3xy-24y=36x-12y+33xy+6y²+3x²

 

potegi czwartej nie mozna bylo wkleic to ci napisalem to napiszesz czworke nad x tym co Ci napisalem pozdro i ucz sie haha .