Question

[tex]c) (3x+1)^{2} +5(x-1)^{2} -(3x+1)^{2} =                     
d) ( \sqrt2x- \sqrt3) ^{2} + ( \sqrt3{x} + \sqrt2) ^{2} =
[/tex]

Answer 1

c) se reduce (3x+1) la patarta cu - (3x+1) ls patrat=> 5(x-i)la patrat=5(x patrat-2x+1)=5 x patrat-10x+5;;;d) 2 xpatrat-2 radical din 6x+3+3xpatrat+2 radical din 6x+2=5xpatrat+5

Answer 2

se folosesc relatiile :
(a+b)^2=a^2+2ab+b^2 si
(a-b)^2=a^2-2ab+b^2
c) se reduce (3x+1)^2 si ramane doar 5(x-1)^2=5(x^2-2x+1)=5x^2-10x+5
d) 2x^2-2V6x+3+3x^2+2V6x+2=5x^2+5