Square root 2

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

Correct result:

m1 =  3
m2 =  0

Solution:

x=7 3m2+22−x=0 3m2+22−7=0 3m2+22=7  3m2+22=72 3m2+22=49  3m2−27=0  a=3;b=0;c=−27 D=b2−4ac=02−4⋅3⋅(−27)=324 D>0  m1,2=−b±D2a=±3246 m1,2=±186 m1,2=±3 m1=3 m2=−3   Factored form of the equation:  3(m−3)(m+3)=0 m1=3

Our quadratic equation calculator calculates it.

m2=0

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