Question

Solve for w
w2+4w-21=0
If there is more than one solution, separate them with commas.
If there is no solution, click on "No solution."

Answer 1

Step-by-step explanation:

w2+7w-3w-21

w(w+7) -3(w+7)

(w-3) (w+7)

w-3=0 w+7=0

w=3. , w= -7.

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Answer 2

Step-by-step explanation:

${w}^{2} + 4w - 21 \\ = {w}^{2} + 7w - 3w - 21 \\ = w(w + 7) - 3(w + 7) \\ = (w + 7)(w - 3) \\ w = - 7 \\ w = 3$

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