Odpowiedź:
A. (3x-2)(4x-3)-(2x-3)(4+6x)=4
12x2-9x-8x+6-(8x+12x2 -12-18x) = 4
12x2 -9x-8x+6x -(-10x+12x2 -12)=4
12x2 -9x -8x +6+10x-12x2 +12 = 4
-7x+18=4
-7x=4-18
-7x=-14
x=2
B.(2+x)(x-5)-(2-x)(3-x)=x-12
2x-10+x2 - 5x - (6-2x-3x+x2)=x-12
2x-10+x2 -5x-6+5x-x2 =x-12
2x-16=x-12
2x-x=-12+16
x=4
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Odpowiedź:
A. (3x-2)(4x-3)-(2x-3)(4+6x)=4
12x2-9x-8x+6-(8x+12x2 -12-18x) = 4
12x2 -9x-8x+6x -(-10x+12x2 -12)=4
12x2 -9x -8x +6+10x-12x2 +12 = 4
-7x+18=4
-7x=4-18
-7x=-14
x=2
B.(2+x)(x-5)-(2-x)(3-x)=x-12
2x-10+x2 - 5x - (6-2x-3x+x2)=x-12
2x-10+x2 -5x-6+5x-x2 =x-12
2x-16=x-12
2x-x=-12+16
x=4
Szczegółowe wyjaśnienie: