求解下列的计算 可以运用公式的用公式主要过程拜托啦
2个回答

(1)5√28-9√1/3-1/3√63+√12

=5*√4*√7-9*(√3)/3-(√7*√9)/3+√3*√4

=10√7-3√3-√7+2√3

=10√7-√7+2√3-3√3

=9√7-√3

(2)(√12-√0.5)-(√75-√18)

=[√3√4-(√2)/2]-(√25*√3-√9√2)

=[2√3-(√2)/2]-(5√3-3√2)

=2√3-5√3-(√2)/2+3√2

=(2-5)√3+(3-1/2)√2

=-3√3+(5√2)/2

(3)5/6√18÷2√8×1/3√54

=5/6*3√2/(4√2)*1/3*3√6

=(5√2)/2/(4√2)*√6

=(5√2)/(4√2)/2*√6

=5/8*√6=(5√6)/8

(4)(√3+2)²(7-4√3)

=(3+4√3+4)(7-4√3)

=(7+4√3)(7-4√3)

=7²-(4√3)²

=49-48=1

(5)(√2+1)^2012(√2-1)

=(√2+1)^2011*(√2+1)*(√2-1)

=(√2+1)^2011*(2-1)

=(√2+1)^2011