Question

inmultiti polinoamele...va rog mult ajutatima
1) (x-5)(x+10)
2) (x-10)(x+5)
3)(x-3)(x²+4x+4)
4) (x-4)(x²+6x+5)
5) (x+3(x²=8x+4)
6)(x+1)(x²+9x+5)
7)  (x+5)(x²+7x+5)

Answer 1

1) x^2 + 5x - 50
2)x^2 -5x-50
3)x^3 +4X^2 + 4X-3X^2 -12X -12
4)x^3 +6x^2 + 5x - 4X^2 -24x -20
5)X^3 + 8X^2 + 4x + 3X^2 + 24X +12
6)X^3 +9X2 + 5x + X^2 + 9x+5
7)X^3 + 7X^2 + 5x + 5X^2 + 35X + 25

Answer 2

1)  (x-5)(x+10) = x(x+10) - 5(x+10) = x²+10x-5x-50 = x²+5x-50
2)  (x-10)(x+5) = x(x+5) - 10(x+5) = x²+5x-10x-50 = x²-5x+50
3)  (x-3)(x²+4x+4) = x(x²+4x+4) - 3(x²+4x+4) = x³+4x²+4x-3x²-12x-12 = x³+x²-8x-12
4)  (x-4)(x²+6x+5) = x(x²+6x+5) - 4(x²+6x+5) = x³+6x²+5x-4x²-24x-20 = x³+2x²-19x-20
5)  (x+3)(x²-8x+4) = x(x²-8x+4) + 3(x²-8x+4) = x³-8x²+4x+3x²-24x+12 = x³-5x²-20x+12
6)  (x+1)(x²+9x+5) = x(x²+9x+5) + 1(x²+9x+5) = x³+9x²+5x+x²+9x+5 = x³+10x²+14x+5
7)  (x+5)(x²+7x+5) = x(x²+7x+5) + 5(x²+7x+5) = x³+7x²+5x+5x²+35x+25 = x³+12x²+40x+25