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Answering math questions in the second day of junior high school
( 1)x? -8 1=0

Move items and get x? =8 1

Square both sides at the same time, x = 9.

∴x 1=9 x2=-9

(2)9x? = 1

x? = 1/9 x = 1/3 ∴x 1= 1/3 x2 =- 1/3

(3) The cubic of x =0.00 1.

If both sides are open at the same time, x=0. 1.

(4) The cube of (x-1) is 8.

If both sides are open at the same time, X- 1=2.

∴x=3

(5)27x cubic =8

Divide both sides by 27 to get x 3 = 8/27.

If both sides are open at the same time, x=2/3.

(6)│x│=√ 10 simplification

There are two numbers whose absolute values are equal to ∵ 10. They are a pair of opposites, namely ∵ 10.

∴ X = √ 10 after removing the absolute value sign.

∴x 1=√ 10 x2 =-√ 10

simplify

( 1)(√27+√3)/√3- 1

=(3√3+√3)/√3-√3/√3

=(3√3+√3-√3)/√3

=3

(2)(√20+√80)/√5

=√20/√5+√80/√5

=√4+√ 16

=2+4

=6

(3)(√5+√6)(√5-√6)

=(√5)^2-(√6)^2

=5-6

=- 1

(4)√ 12-√( 1/2)-2√( 1/3)

=2√3-( 1/2)√2-(2/3)√3

=(4/3)√3-( 1/2)√2