Question

urgente pfv
$(7x {}^{3} + {12x}^{2} - 4x + 3) + ( - {5x }^{2} + - 7x - 4)$

Answer 1

7x³ +(12 -5)x² +(-4 -7)x +(3 -4)

7x³ +7x² -11x -1