Doprowadź do najprostszej postaci :
a)(x+3)(x-2)[email protected]
Doprowadź do najprostszej postaci:
a) (x+3)(x-2)+(x-1)(x+5)=
b)(2x-1)(3x-4)-(x+2)(1-2x)=
c)5x(2-x)+(4x-1)(3+2x)-(x-1)=
d)-3x(2x+7)-(-x-3)(4-x)+(2-3x)(3+2x)=\
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a)x²-2x+3x-6+x²+5x-x-5=2x²+5x-5
b)6x²-8x-3x+4-(x-2x²+2-4x)=6x²-8x-3x+4-x+2x²-2+4x=8x²-8x+2
c)10x-5x²+12x+8x-3-2x-x+1=-5x²+27x-2
d)-6x²-21x-(-4x+x²-12-3x)+6+4x-9x-6x=-6x²-21x+4x-x²+12-3x+6+4x-9x-6x=-7x²-31x+18
1) (x+3)(x-2)+2=
x^2-2x+3x-6+2 =
x^2+x-4
2) (x+3)(x-2)+(x-1)(x+5)=
x^2-2x+3x-6+x^2+5x-x-5=
2x^2+5x-11
(2x-1)(3x-4)-(x+2)(1-2x)=
6x^2-8x-3x+4-x+2x^2-2+4x=
8x^2-8x+2
5x(2-x)+(4x-1)(3+2x)-(x-1)
10x-5x^2+12x+8x^2-3-2x-x+1=
19x+3x^2-2
-3x(2x+7)-(-x-3)(4-x)+(2-3x)(3+2x)
-6x^2-21+4x-x^2+12-3x+6+4x-9x-6x^2=
-13x^2-3x-4