Tim x,y,z biet ;

a, |x| + (-2) ² = 3² + \(\dfrac{1}{2}\)³

GIUP MINH VOI BAI NAY KHO QUA ! THANK YOU

Cho tam giac ABC can ( AB=AC ) , duong cao BE, CF. Cm : EFBC la hinh thang

GIUP MINH VOI , THANK YOU NHIEU !^^

Bai 1: Cho x+y= 5 , xy= 6. Khong tinh x,y hay tinh

a, \(\dfrac{1}{x}+\dfrac{1}{y}\)

b, x² + y²

c, x-y

Giup minh vs bai nay kho qua, Thanks nhieu !^_^

Bai 1: CM cac bieu thuc sau khong co gia tri am :

a, A = x² - 4x + 9

b, B = 4x² + 4x + 2017

c, C = 9 - 6x + x²

GIUP MINH VOI BAY NAY KHO QUA !

Bai 1: Tim x, biet :

a, 0,6x ( x-0,5 ) - 0,3x ( 2x+1,3 ) = 0,138

( 3x-2 )² -2x( 3x+8 ) = 0

Giup minh voi thank nhieu

Bai 1: Tim x

a, ( 3x-2 )² -2x( 3x+8 ) = 0

b, ( 4x+3 )² - ( 4x+5) (4x-5 ) = 12