Toán Lớp 9: Tính
a)√3 (√3 -1)
b)(√5 – 2) (√5 + 2)
c)(√3 – 2)²
d)(2√5 + 1)²
e)(√3 – 1)(√3 + 2)
f)(√5 – 2) (3 + √5)
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Toán Lớp 9: Tính
a)√3 (√3 -1)
b)(√5 – 2) (√5 + 2)
c)(√3 – 2)²
d)(2√5 + 1)²
e)(√3 – 1)(√3 + 2)
f)(√5 – 2) (3 + √5)
Comments ( 2 )
a)√3 (√3 -1)=3-√3 b)(√5 – 2) (√5 + 2)=1 c)(√3 – 2)²=7-4√3d)(2√5 + 1)²=21+4√5 e)(√3 – 1)(√3 + 2)=1+√3 f)(√5 – 2) (3 + √5)=-1+√5