If it's not what You are looking for type in the equation solver your own equation and let us solve it.
X^2+7=-4X^2-9X+4
We move all terms to the left:
X^2+7-(-4X^2-9X+4)=0
We get rid of parentheses
X^2+4X^2+9X-4+7=0
We add all the numbers together, and all the variables
5X^2+9X+3=0
a = 5; b = 9; c = +3;
Δ = b2-4ac
Δ = 92-4·5·3
Δ = 21
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:$X_{1}=\frac{-b-\sqrt{\Delta}}{2a}$$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$X_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(9)-\sqrt{21}}{2*5}=\frac{-9-\sqrt{21}}{10} $$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(9)+\sqrt{21}}{2*5}=\frac{-9+\sqrt{21}}{10} $
| −8−x=x−4x* | | -(x+5)-(2x+1)=0 | | 14y+28+6y=−44 | | 2k=5=21 | | (5x-31)=(4x+2) | | x5−6=−3 | | 6x7= | | 7f+0.4=2(f-5) | | -5x+2-8=-8x-5+2 | | 2.5(y+2)-1.5y=0 | | 3/5s=63 | | -38=7x+17-12 | | x|8+13=3 | | 1/3t=55 | | 6a-12=-8 | | 3.2x+26=42 | | 300=20n-8n | | 7/3v-3=-3/4v-1/3 | | 5.2y=14.2 | | -7x=6=27 | | x/3-1=x/4-2 | | 3m-5=2m-7 | | 62-x=912 | | (2x-5)=(x-5) | | 9-x=39-x | | 8(7+x)=5x+56 | | n−3n=14−4n* | | 10+x+34=122 | | -3-a(a+1)=a(1-a) | | 9-x=×-39 | | 62×x=912 | | -12=n2−6 |