Grouping for factoring: Group terms to prepare for factoring by grouping. Group the first two terms and the last two terms separately. 10m3−10m2 - m−1
Factor out common factor: Factor out the common factor from the first group.Factor out 10m2 from the first group.10m2(m−1)−(m−1)
Factor out common binomial: Factor out the common factor from the second group.Notice that the second group already has a common factor of 1, so we can write it as 1(m−1).10m2(m−1)−1(m−1)
Recognize difference of squares: Factor out the common binomial factor.Now we can factor out the common binomial factor (m−1) from both groups.(m−1)(10m2−1)
Final factored form: Recognize the difference of squares in the second term.The term 10m2−1 is a difference of squares and can be factored further.(m−1)((10m)2−(1)2)(m−1)((10m+1)(10m−1))
Math error correction: Write the final factored form.The final factored form of the polynomial is:(m−1)(10m+1)(10m−1)However, this step contains a math error because we incorrectly took the square root of 10m2 as 10m. The correct factorization of 10m2−1 should be (10m+1)(10m−1) since it is a difference of squares.