(3倍根号7+2倍根号3)*(2倍根号3-3倍根号7)

问题描述:

(3倍根号7+2倍根号3)*(2倍根号3-3倍根号7)

(3倍根号7+2倍根号3)*(2倍根号3-3倍根号7)
=(2√3)²-(3√7)²
=12-63
=-51