Question

.After solution of s²+10s+21 = 0 answer will b​

Answer 1

Step-by-step explanation:

s^2+10s+21=0

s^2+3s+7s+21=0

s(s+3)+7(s+3)=0

(s+7)(s+3)=0

s+7=0

s=-7

s+3=0

s=-3

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