Use grouping to factor the polynomial.ax + bx + ay + by
A. (x - y)(a - b)
B. (x + y)(a + b)
C. (x + y)(a - b)
D. (x - y)(a + b)
Answer: B
Mathematics
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, find the exact value of f(-a).
A. - 
B. 
C. - 
D. 
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B. - 
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A. 
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C. 
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