Example

Solving 8x3=24x218x8x^3 = 24x^2 - 18x by Factoring

Solve the polynomial equation 8x3=24x218x8x^3 = 24x^2 - 18x by converting it to standard form and applying factoring techniques.

Step 1 — Write in standard form. Subtract 24x224x^2 and add 18x18x to both sides to bring all terms to one side: 8x324x2+18x=08x^3 - 24x^2 + 18x = 0

Step 2 — Factor the greatest common factor. The three terms share a common factor of 2x2x. Factor it out: 2x(4x212x+9)=02x(4x^2 - 12x + 9) = 0

Step 3 — Factor the trinomial. The remaining trinomial is a perfect square trinomial: 2x(2x3)(2x3)=02x(2x - 3)(2x - 3) = 0

Step 4 — Apply the Zero Product Property. Set each variable factor to zero: 2x=0or2x3=0or2x3=02x = 0 \quad \text{or} \quad 2x - 3 = 0 \quad \text{or} \quad 2x - 3 = 0

Step 5 — Solve each equation: x=0orx=32orx=32x = 0 \quad \text{or} \quad x = \frac{3}{2} \quad \text{or} \quad x = \frac{3}{2}

The distinct solutions are x=0x = 0 and x=32x = \frac{3}{2}.

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Updated 2026-04-30

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