1. Tính: a) 2x*(2x^2-3x+5)+6x^2 b) (2+x)*(2-x)-4 c) (x+5)^2-10x 2. Tìm x, biết: a) 3*(x^2-2x+1)=3x^2+3 b) (3-x)^2-(x-1)*(2+x)=0

asked Dec 11, 2022 109k views

2 votes

1. Tính:

a) 2x*(2x^2-3x+5)+6x^2
b) (2+x)*(2-x)-4
c) (x+5)^2-10x
2. Tìm x, biết:
a) 3*(x^2-2x+1)=3x^2+3
b) (3-x)^2-(x-1)*(2+x)=0

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4 votes

Answer:

1.b (2+x)*(2-x)-4

2.a 3*(x^2-2x+1)=3x^2+3

Ptman answered Dec 17, 2022

by Ptman

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