solutions of 7(a²+b²)² -15(a⁴-b⁴) +8(a²-b²)²
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Answer:
-2a²b²
Step-by-step explanation:
7(a²+b²)² -15(a⁴-b⁴) +8(a²-b²)²
7(a4+b4+2a²b²-15(a4-b4)+8(a4+b4-2a²b²)
=7a4+7b4+14a²b²-15a4-15b4+8a4+8b4-16a²b²
=14a²b²-16a²b²
= -2a²b²
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