If it's not what You are looking for type in the equation solver your own equation and let us solve it.
4x^2-9x^2=15
We move all terms to the left:
4x^2-9x^2-(15)=0
We add all the numbers together, and all the variables
-5x^2-15=0
a = -5; b = 0; c = -15;
Δ = b2-4ac
Δ = 02-4·(-5)·(-15)
Δ = -300
Delta is less than zero, so there is no solution for the equation
| 3(-3(x-x^2)-4x)=9x^2+211 | | 2x+6-5x=7x-12x+4 | | x8-80=3x-5 | | 1.5x-7=15 | | 4x^2=57(.1-x)(.25-x) | | 15x=-8x | | n=15-n | | 2500÷x=5.16 | | 14x=444 | | x=8+1/2.5 | | m+8=m3 | | x(x-60)=40 | | y=40-4y | | g+3/7=1/7 | | x-8/7=5/7 | | 4x^2=((5.7-57x)(14.25-57x)) | | 4-9(y-3)=-14 | | 2x^2-1/2x-30=0 | | 2+x/3=3x-12 | | Y=50(2.5)x | | y*15-16=y+10*3 | | c-1=70 | | m-3/5=33-m/4 | | 2.8+x=3.4 | | 2.5x-7=14 | | y=0.13+0.4× | | A/2a/3=8+4a | | y=0.13+0.4×= | | 4x=4x=44=180 | | n+75=115 | | x+88=126 | | 8x-3x+2x=16+2 |