Question

7. Calculează, reducând termenii asemenea:
a) (x + 2)(x + 3);
b) (x - 1)(x – 4);
c) (x - 3)(x + 4);
d) (x + 5)(x - 1);
e) (2x + 1)(3x + 2);
f) (4x – 1)(5x + 2);
g) (1 - x)(3x + 1);
h) (4x + 1)(5x – 2)​

Answer 1

Răspuns:

a) x²+3x+2x+6=x²+5x+6

b) x²-4x-x+5=x²-5x+5

c) x²+4x-3x-12=x²+x-12

d) x²-x+5x-5=x²+4x-5

e) 6x²+4x+3x+2=6x²+7x+2

f)20x²+8x-5x-2=20x²+3x-2

g) 3x+1-3x²-x=-3x²-2x+1

h)20x²-8x+5x-2=20x²-3x-2