Solved

Simplify
- (7x2−xy−y2)+(x2+6xy−5y2)\left( 7 x ^ { 2 } - x y - y ^ { 2 } \right) + \left( x ^ { 2 } + 6 x y - 5 y ^ { 2 } \right)

Question 65

Multiple Choice

Simplify.
- (7x2−xy−y2) +(x2+6xy−5y2) \left( 7 x ^ { 2 } - x y - y ^ { 2 } \right) + \left( x ^ { 2 } + 6 x y - 5 y ^ { 2 } \right)


A) 8x2+5xy+4y28 x ^ { 2 } + 5 x y + 4 y ^ { 2 }
B) 8x2−7xy+4y28 x ^ { 2 } - 7 x y + 4 y ^ { 2 }
C) 8x2+5xy−6y28 x ^ { 2 } + 5 x y - 6 y ^ { 2 }
D) 8x2−7xy+6y28 x ^ { 2 } - 7 x y + 6 y ^ { 2 }

Correct Answer:

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