Question

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zad.1

a)14x²y- 7xy+4xy-12x²y-4xy²= ?

b)1/2x²+1½xy+¾x²-0,5xy-¼x²-¼xy = ?

c)2-(4x+9)-(2x+5)-(4x-1)= ?

d) -(4x² +2x-7)-(8x²+7x+12)+6x-11= ?

e)1-(3x-2x²+6x-8)+(-2x²=5x-10)-(-5x³+6x²-1)= ?

f)(6x⁴- 4x²y-x²y²+y⁴)-(3x³y³+2x²y-y⁴)= ?

Answer 1

a)14x²y- 7xy+4xy-12x²y-4xy²= 2x²y-3xy-4xy²

b)1/2x²+1½xy+¾x²-0,5xy-¼x²-¼xy = x²+¾xy

c)2-(4x+9)-(2x+5)-(4x-1)= 2-4x-9-2x-5-4x+1=-10x-11

d) -(4x² +2x-7)-(8x²+7x+12)+6x-11= -4x²-2x+7-8x²-7x-12+6x-11=-12x²-3x-16

e)1-(3x-2x²+6x-8)+(-2x²=5x-10)-(-5x³+6x²-1)= 1-3x+2x²-6x+8-2x²+5x-10+5x³-6x²+1=5x³-6x²-4x

f)(6x⁴- 4x²y-x²y²+y⁴)-(3x³y³+2x²y-y⁴)= 6x⁴-4x²y-x²y²+y⁴-3x³y³-2x²y+y⁴=

=6x⁴+2y⁴-3x³y³-x²y²-6x²y