(xiii)8a⁴+2a²-45
(xiv) 6 (x – y)² – x+y - 15
(xv) 3 (a+b)²-2a-2b-8
(xvi) 6(a+b)² + 5(a² – b²) –6(a-b)²
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Answer:
(xiii)
ans=(
2
−
3
)
(
2
+
3
)
(
2
2
+
5
)
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