Question

calculati
(x+4)(x-3)-x+12

Answer 1

x²-3x+4x-12-x+12= x² +x-x-12+12=x²
+x si -x se reduc,la fel si -12 cu +12

Answer 2

$(x+4)(x-3)-x+12=x^{2}-12+12=x^{2}$