Square root 2

If the square root of 3m2 +22 and -x = 0, and x=7, what is m?

Correct answer:

m1 =  3
m2 =  -3

Step-by-step explanation:

x=7 3m2+22x=0 3m2+227=0 3m2+22=7  3m2+22=72 3m2+22=49  3m227=0  a=3;b=0;c=27 D=b24ac=0243(27)=324 D>0  m1,2=2ab±D=6±324 m1,2=6±18 m1,2=±3 m1=3 m2=3   Factored form of the equation:  3(m3)(m+3)=0 m1=3

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Showing 1 comment:
Night Fury
Thank u for your help☺️

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