Q. Factor the following expression completely.x4−16x2−5x3+80x−6x2+96Answer:
Rearrange Terms: First, we need to rearrange the terms of the expression in descending order of the powers of x.x4−5x3−16x2−6x2+80x+96Combine like terms.x4−5x3−22x2+80x+96
Combine Like Terms: Next, we look for common factors in groups of terms. We can group the terms as follows:(x4−5x3)−(22x2−80x)+96Now we factor by grouping.
Group and Factor: Factor out the greatest common factor from each group. x3(x−5)−22x(x−4)+96
Further Factorization: We notice that the expression does not have a common factor in all terms, but we can look for a pattern or factors that can be factored further. The term +96 seems to be out of place, so we should check if we can factor the trinomial x3(x−5)−22x(x−4) further.
Correct Mistake: Let's try to factor by splitting the middle term of the quadratic part of the expression.We are looking for two numbers that multiply to give −5×−22 (the coefficient of x4 times the constant term of the quadratic part) and add up to give the coefficient of the x term in the quadratic part, which is 0.However, we made a mistake in the previous step; the term +96 should have been included in the grouping. We need to correct this before proceeding.
More problems from Operations with rational exponents