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mathdad
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Precalculus by David Cohen, 3rd Edition
Chapter 1, Section 1.3.
Question 48.
Factor the expression by grouping.
a^2t^2 + b^2t^2 - cb^2 - ca^2
Group A = a^2t^2 + b^2t^2
Group A = t^2(a^2 + b^2)
Group B = -cb^2 - ca^2
Group B = -c(b^2 + a^2)
Group B = -c(a^2 + b^2)
Group A - Group B
t^2(a^2 + b^2) - c(a^2 + b^2)
(t^2 - c)(a^2 + b^2)
Correct?
Chapter 1, Section 1.3.
Question 48.
Factor the expression by grouping.
a^2t^2 + b^2t^2 - cb^2 - ca^2
Group A = a^2t^2 + b^2t^2
Group A = t^2(a^2 + b^2)
Group B = -cb^2 - ca^2
Group B = -c(b^2 + a^2)
Group B = -c(a^2 + b^2)
Group A - Group B
t^2(a^2 + b^2) - c(a^2 + b^2)
(t^2 - c)(a^2 + b^2)
Correct?