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Simplifying x(3x + -9) = (3x + 7)(x + -3) Reorder the terms: x(-9 + 3x) = (3x + 7)(x + -3) (-9 * x + 3x * x) = (3x + 7)(x + -3) (-9x + 3x2) = (3x + 7)(x + -3) Reorder the terms: -9x + 3x2 = (7 + 3x)(x + -3) Reorder the terms: -9x + 3x2 = (7 + 3x)(-3 + x) Multiply (7 + 3x) * (-3 + x) -9x + 3x2 = (7(-3 + x) + 3x * (-3 + x)) -9x + 3x2 = ((-3 * 7 + x * 7) + 3x * (-3 + x)) -9x + 3x2 = ((-21 + 7x) + 3x * (-3 + x)) -9x + 3x2 = (-21 + 7x + (-3 * 3x + x * 3x)) -9x + 3x2 = (-21 + 7x + (-9x + 3x2)) Combine like terms: 7x + -9x = -2x -9x + 3x2 = (-21 + -2x + 3x2) Add '-3x2' to each side of the equation. -9x + 3x2 + -3x2 = -21 + -2x + 3x2 + -3x2 Combine like terms: 3x2 + -3x2 = 0 -9x + 0 = -21 + -2x + 3x2 + -3x2 -9x = -21 + -2x + 3x2 + -3x2 Combine like terms: 3x2 + -3x2 = 0 -9x = -21 + -2x + 0 -9x = -21 + -2x Solving -9x = -21 + -2x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2x' to each side of the equation. -9x + 2x = -21 + -2x + 2x Combine like terms: -9x + 2x = -7x -7x = -21 + -2x + 2x Combine like terms: -2x + 2x = 0 -7x = -21 + 0 -7x = -21 Divide each side by '-7'. x = 3 Simplifying x = 3
| x(3x-9)=(3x+7)(x-3) | | 4x+22=6x+4 | | 9x^2+4y^2=25 | | -16a^6+8a^5-4a^4= | | f(x)=5*2.5x^2 | | 3a+2a=5a-24 | | 2x+(2x+1)=3 | | 2x-27=x+3 | | 6.4e+8= | | 6+0.10x=10 | | 10x+25=50 | | (10x)x(10y)= | | 2-3(2x+7)=-8+5x | | -3(6y-7)-y=-2(y-3) | | 23+18v=-21+14 | | 16y-15y=-5+5 | | 0.3(2z+5)=0.7(z-3)+2.6 | | (x+6)3=2x-5 | | 14x+7.2=91.2 | | 2.1n-1.1n+2.2=6.6+.7 | | 8x-(3x+9)=8x-33 | | 9x-3x+6=x-2+8 | | x^2+8x+z=0 | | 2(25-10x)=-5-14x | | w-14=9 | | 7(-4)-6+4=x | | 3x^2-45x+45=57 | | 50p+15=30+40(1-p)+10+10 | | (-9v^2-8u)+(-2uv-2u^2+v^2)+(-v^2+4uv)= | | 60x=85x+10 | | 6(4z-1)-5(z+5)=2(z+1) | | 50(1-p)+15=30+40p+10+10 |