Q. Factor the following expression completely.x4−3x3+2x2−9x2+27x−18Answer:
Combine like terms: First, let's rewrite the expression by combining like terms. x4−3x3+(2x2−9x2)+27x−18x4−3x3−7x2+27x−18
Factor by grouping: Now, we look for common factors in pairs of terms or try to factor by grouping.Group the terms as follows: x4−3x3 + −7x2+27x - 18
Factor out common factors: Factor out the greatest common factor from each group.x3(x−3)−7x(x−3)−18Notice that (x−3) is a common factor in the first two groups.
Factor remaining term: Now, factor (x−3) out of the first two groups.(x−3)(x3−7x)−18
Cannot factor further: We can't factor x3−7x further using integer coefficients, but we can factor out an x.(x−3)(x(x2−7))−18
Cannot factor further: We can't factor (x3−7x) further using integer coefficients, but we can factor out an x.(x−3)(x(x2−7))−18Now, we look at the remaining term, −18, to see if it can be factored with (x−3).Since 18 is not a multiple of (x−3), we cannot factor it out directly. However, we can look for a pattern or a common factor that includes −18 and the rest of the expression.
Cannot factor further: We can't factor (x3−7x) further using integer coefficients, but we can factor out an x.(x−3)(x(x2−7))−18Now, we look at the remaining term, −18, to see if it can be factored with (x−3).Since 18 is not a multiple of (x−3), we cannot factor it out directly. However, we can look for a pattern or a common factor that includes −18 and the rest of the expression.We notice that the expression does not have a common factor that includes −18. Therefore, we cannot factor it with the rest of the expression. The expression is already factored as much as possible with integer coefficients.
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