Let x be a real number, and x2-ax-21=(x+3)(x+b) with a, b constants . find a and b.

Question

Математика: Let x be a real number, and x2-ax-21=(x+3)(x+b) with a, b constants . find a and b.​

marysyalabetska · Answer

ответ: a=4, b=-7.Пошаговое объяснение:x²-a*x-21=x²+x*(b+3)+3*b, -a*x-21=(b+3)*x+3*b ⇒-a=b+33*b=-21 ⇒b=-7⇒a=4....

Let x be a real number, and x2-ax-21=(x+3)(x+b) with a, b constants . find a and b.​