Question

Aduceti la forma cea mai simpla expresia:
a) (3a-1)(3a+1)-17a²
b) (3m-2)(3m+2)+4
c) 5b²+(3-2b)(3+2b)
d) (0,8x+15)(0,8x-15)+0,36x²

Answer 1

Răspuns:

a) 9a^2 - 1 - 17a^2 = - (8a^2 + 1)

b) 9m^2 - 4 + 4 = 9m^2

c) 5b^2 + 9 - 4b^2 = b^2 + 9

d) 0,64x^2 - 225 + 0,36x^2 = 0,28x^2 - 225