If it's not what You are looking for type in the equation solver your own equation and let us solve it.
351=(x-4)(x+4)
We move all terms to the left:
351-((x-4)(x+4))=0
We use the square of the difference formula
x^2+16+351=0
We add all the numbers together, and all the variables
x^2+367=0
a = 1; b = 0; c = +367;
Δ = b2-4ac
Δ = 02-4·1·367
Δ = -1468
Delta is less than zero, so there is no solution for the equation
| 91=77+x | | 8−5v=–4v | | 1.2x+3.6x+7.1=45.5 | | X-1x=10 | | 2x-4÷6=56=5 | | (7x+4)+(6x+2)=45 | | 2(n-1)=24 | | 18/k−6=26−10/k | | 2(5z+1)-6=56 | | (4x+2)+(8x+5)=55 | | 6•x-15=45 | | 2x-4÷6=5 | | 3/8s+5=−25/4 | | 180=(2x+28)+(3x+40)+I | | 22/3=12p-23p | | r²-10r+17=0 | | 9y+7=11y+21 | | 9y+6=2y+41 | | -1.2x=-8.4 | | 15=-0.3x | | 16x-8=24+8x | | (((5+x)*3)-6)/4=11 | | (((5+x)*x)-6)/4=11 | | 12-9+m=12. | | 2x3+15x2+37x+39=0 | | 6x²-3x=+3x-2x(-x+1) | | x2-169=0x | | 2=6(u+2)-8u | | 2.5a+6=9a+12 | | 14x+72–3x=16+4x | | 14x +72–3x=16+4x | | 10x+5(x+3)=75 |