Bài 1. a) A= 2+ 8− 50= 2+2 2−5 2 = −2 2b) B=(2− 3)(2+ 3)= − =4 3 1c) C =3 2( 50 −2 18+ 98) =3 2(5 2−6 2+7 2) =3 2.6 2 =18.2 = 36 2( 1A x

A) A= 2+ 8− 50= 2+2 2−5 2 = −2 2B) B=(2− 3)(2+ 3)= − =4 3 1C)...

DE THI HOC KI 1 TOAN 9 DAY DU DAP AN CAU TRUC CHUAN

Bài 1. a)

^A= ²+ ⁸− ⁵⁰= ²+^{2 2}−^{5 2} = −^{2 2}

b)

^B⁼

(

²⁻ ³

)(

²⁺ ³

)

^{= − =}^{4 3 1}

c)

C =

3 2( 50

−

2 18

98) =

³ ²⁽⁵ ²−⁶ ²+⁷ ²⁾ =3 2.6 2

=

¹⁸^.²

= 36

2( 1A x

A) A= 2+ 8− 50= 2+2 2−5 2 = −2 2B) B=(2− 3)(2+ 3)= − =4 3 1C)...