Question

Please help me to solve this question:m²+4m-21=0​

Answer 1

Answer: m =(-4-√96)/2=-2-2√ 6 = -6.899

m =(-4+√96)/2=-2+2√ 6 = 2.899

Step-by-step explanation:

Answer 2

Step-by-step explanation:

a+b=4

ab=1(−21)=−21

−1,21

−3,7

−1+21=20

-3+7=4

a=−3

b=7

(m²−3m)+(7m−21)

m(m−3)+7(m−3)

(m−3)(m+7)

Hope this is correct