Q. Factor the following expression completely.x4−6x3−7x2−9x2+54x+63Answer:
Combine Like Terms: First, let's combine like terms in the expression.x4−6x3−7x2−9x2+54x+63= x4−6x3−(7+9)x2+54x+63= x4−6x3−16x2+54x+63
Factor by Grouping: Next, we look for common factors or patterns that might help us factor the expression. We can try to factor by grouping, which involves grouping terms to find a common factor.Group the terms as follows:(x4−6x3)−(16x2−54x)+63Now, factor out the common factors from each group.x3(x−6)−2x(8x−27)+63
Identify Math Error: We notice that the last term, 63, does not fit into the pattern of the grouped terms. We need to see if there is a common factor that can be factored out from all terms or if there is a mistake in the previous step.Upon reviewing the previous step, we realize that we cannot factor out −2x from (16x2−54x) because −2 is not a factor of 54. This is a math error.
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