-7x(2)=21

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Solution for -7x(2)=21 equation: 



-7x(2)=21

We move all terms to the left:

-7x(2)-(21)=0

We add all the numbers together, and all the variables

-7x^2-21=0

a = -7; b = 0; c = -21;
Δ = b2-4ac
Δ = 02-4·(-7)·(-21)
Δ = -588
Delta is less than zero, so there is no solution for the equation

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