已知p²-pq=1,4pq-3q²=2,求p²+3pq-3q²的值
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![已知p²-pq=1,4pq-3q²=2,求p²+3pq-3q²的值](/uploads/image/z/657355-67-5.jpg?t=%E5%B7%B2%E7%9F%A5p%26%23178%3B%EF%BC%8Dpq%EF%BC%9D1%2C4pq%EF%BC%8D3q%26%23178%3B%EF%BC%9D2%2C%E6%B1%82p%26%23178%3B%EF%BC%8B3pq%EF%BC%8D3q%26%23178%3B%E7%9A%84%E5%80%BC)
已知p²-pq=1,4pq-3q²=2,求p²+3pq-3q²的值
已知p²-pq=1,4pq-3q²=2,求p²+3pq-3q²的值
已知p²-pq=1,4pq-3q²=2,求p²+3pq-3q²的值
p²+3pq-3q²
=p²-pq+4pq-3q²
=1+2
=3
将4pq-3q²=2看作1式,p²-pq=1看作2式,2式减1式=4pq-3q²-p²+pq=p²+3pq-3q²=1