Q. What is the factored form of \(8x^{2}+12x\)?
Answer
We interpret the expression as \(8x^{2}+12x\). Factor out the GCF \(4x\):
\[
8x^{2}+12x = 4x(2x+3)
\]
\[
4x(2x+3)=8x^{2}+12x
\]
Final result: \(\boxed{4x(2x+3)}\).
Detailed Explanation
Problem: Factor: \(8x^{2}+12x\)
Step 1 — Identify the greatest common factor (GCF) of the coefficients and variables.
- Coefficients: \(\gcd(8,12)=4\).
- Variables: the terms are \(8x^{2}\) and \(12x\). The smallest power of \(x\) present is \(x^{1}\), so the variable part of the GCF is \(x\).
- Therefore the overall GCF is \(4x\).
Step 2 — Divide each term by the GCF and factor it out.
- \(\dfrac{8x^{2}}{4x}=2x\).
- \(\dfrac{12x}{4x}=3\).
- Factor out \(4x\) from the original expression:
\[
8x^{2}+12x=4x\bigl(2x+3\bigr).
\]
Step 3 — Verify by distributing to confirm equality.
- Distribute \(4x\) over \(\bigl(2x+3\bigr)\):
\[
4x\cdot 2x=8x^{2},\qquad 4x\cdot 3=12x.
\] - Sum of distributed terms: \(8x^{2}+12x\).
- Thus the factorization is correct.
Final factored form:
\[
8x^{2}+12x=4x\bigl(2x+3\bigr)
\]
See full solution
FAQs
What is the greatest common factor of (8x^2 + 12x)?
The GCF is (4x) because (gcd(8,12)=4) and the smallest power of (x) present is (x^1).
What is the correct factored form of (8x^2 + 12x)?
(4x(2x+3)). Factoring out (4x) leaves (2x+3).
Is (4(4x^2 + 8x)) a correct factorization?
No. (4(4x^2+8x)=16x^2+32x), which is not equal to (8x^2+12x).
Could I factor out (8x) instead of (4x)?
You can, but it yields fractions: (8x(x+tfrac{3}{2})). For integer-only factors, use (4x).
Is (4x(2x+3)) fully factored?
Yes. (2x+3) is linear and irreducible over the integers, so this is the complete factorization.
How can I check my factorization quickly?
Multiply the factors: (4x(2x+3)=8x^2+12x). If it matches the original polynomial, the factorization is correct.
Why not factor by grouping here?
Grouping is for four-term polynomials or special patterns. This two-term expression is factored by pulling out the GCF, which is simpler and appropriate.
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