Identify GCF: Identify the greatest common factor (GCF) of the terms 12x3y4z2 and 4x7y2. The GCF of the numerical coefficients (12 and 4) is 4. The GCF of the x terms (x3 and x7) is x3, since we take the lowest power. The GCF of the y terms (4x7y20 and 4x7y21) is 4x7y21, since we take the lowest power. There is no 4x7y23 term in the second term, so 4x7y24 is not part of the GCF. The GCF is therefore 4x7y25.
Factor out GCF: Factor out the GCF from the original expression. 4x3y2 is factored out, leaving us with the expression inside the parentheses. 12x3y4z2 divided by 4x3y2 gives us 3y2z2. 4x7y2 divided by 4x3y2 gives us x4. The factored expression is 4x3y2(3y2z2+x4).
Check factored expression: Check the factored expression by distributing the GCF back into the parentheses to ensure it gives us the original expression.4x3y2(3y2z2)=12x3y4z2.4x3y2(x4)=4x7y2.The original expression is recovered, confirming the factoring is correct.
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