-2(x^2-7)+5=23

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Solution for -2(x^2-7)+5=23 equation: 



-2(x^2-7)+5=23

We move all terms to the left:

-2(x^2-7)+5-(23)=0

We add all the numbers together, and all the variables

-2(x^2-7)-18=0

We multiply parentheses

-2x^2+14-18=0

We add all the numbers together, and all the variables

-2x^2-4=0

a = -2; b = 0; c = -4;
Δ = b2-4ac
Δ = 02-4·(-2)·(-4)
Δ = -32
Delta is less than zero, so there is no solution for the equation

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