若代数式4y²+ay+6-2(by²+2y)-1值与y无关,求代数式a²+2b²-½(a²-3b²)RT
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![若代数式4y²+ay+6-2(by²+2y)-1值与y无关,求代数式a²+2b²-½(a²-3b²)RT](/uploads/image/z/5903649-9-9.jpg?t=%E8%8B%A5%E4%BB%A3%E6%95%B0%E5%BC%8F4y%26%23178%3B%2Bay%2B6-2%28by%26%23178%3B%2B2y%29-1%E5%80%BC%E4%B8%8Ey%E6%97%A0%E5%85%B3%2C%E6%B1%82%E4%BB%A3%E6%95%B0%E5%BC%8Fa%26%23178%3B%2B2b%26%23178%3B-%26%23189%3B%28a%26%23178%3B-3b%26%23178%3B%EF%BC%89RT)
若代数式4y²+ay+6-2(by²+2y)-1值与y无关,求代数式a²+2b²-½(a²-3b²)RT
若代数式4y²+ay+6-2(by²+2y)-1值与y无关,求代数式a²+2b²-½(a²-3b²)
RT
若代数式4y²+ay+6-2(by²+2y)-1值与y无关,求代数式a²+2b²-½(a²-3b²)RT
与y无关
4-2b=0,b=2
a-4=0,a=4
a²+2b²-½(a²-3b²)
=16+8-1/2*(16-12)
=24-2
=22