If it's not what You are looking for type in the equation solver your own equation and let us solve it.
4x^2=-7
We move all terms to the left:
4x^2-(-7)=0
We add all the numbers together, and all the variables
4x^2+7=0
a = 4; b = 0; c = +7;
Δ = b2-4ac
Δ = 02-4·4·7
Δ = -112
Delta is less than zero, so there is no solution for the equation
| 6.25=(6.5+x)/2 | | 3/16=n/15 | | (3w-6)+w=36 | | 4c-2c+4-3c+2c=-9 | | -2m+12=7m-96 | | x=3.2x+7= | | v/9-6=3 | | ƒ(x)=−3x+21 | | 60/v=6/7 | | 2x+7x+1=2(5x+1)+2 | | X/5+x/3=6/15 | | 0.4(10x+11)=4.4(0.2+5) | | -3h+42=8h-23 | | n/4+15=18 | | (X-4)^2+(y-3)^2=25 | | 6-3x=40 | | 6=5+2m | | 3/5=15/n | | 300-84x=x | | 88=11d | | 1/2(x+5)=16+2x | | 2.8x-50=1.5x+2 | | 3z=6(z-5)=-48 | | -9x+3=57+18x | | -v/5=26 | | -1r=5+r | | 9n+10n=+1 | | 9.75+x=308.8 | | -2(X-10)=20+2x | | -8c+2=74 | | 6^x=400 | | 5x+3=5x–4 |