H(-1)=7x^2+4

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Solution for H(-1)=7x^2+4 equation: 



(-1)=7H^2+4

We move all terms to the left:

(-1)-(7H^2+4)=0

We add all the numbers together, and all the variables

-(7H^2+4)-1=0

We get rid of parentheses

-7H^2-4-1=0

We add all the numbers together, and all the variables

-7H^2-5=0

a = -7; b = 0; c = -5;
Δ = b2-4ac
Δ = 02-4·(-7)·(-5)
Δ = -140
Delta is less than zero, so there is no solution for the equation

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