👤

3x(x + 1)² - (2x - 3)(2x + 3)² + x²(5x + 6)​

Răspuns :

3x(x+1)²-(2x-3)(2x+3)²+x²(5x+6)=

=3x(x²+2x+1)-(2x-3)(4x²+12x+9)+5x³+6x²=

=3x³+6x²+3x-(8x³+24x²+18x-12x²-36x-28)+5x³+6x²=

=3x³+6x²+3x-(8x³+12x²-18x-28)+5x³+6x²=

=3x³+6x²+3x-8x³-12x²+18x+28+5x³+6x²=21x+28

Răspuns:

Explicație pas cu pas:

Vezi imaginea MAMA80