sarissal sarissal

16-03-2020
Mathematics

contestada

Solve for x.
X 2+ 4x-21 = 0

A.-3,-7
B. -3,7
C.3,-7
D.3,7

Respuesta :

kategins kategins

16-03-2020

answer: C
explanation: when you simplify the quadratic you get (x+7)(x-3), so the roots are -7 and 3

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