Bài 1 : a, 4 . $x^{3}$ – 17 . 2$x^{4}$ + 25 . 2020$x^{0}$ = 4 . 125 – 17 . 12 + 25 . 2020 = ( 4 . 125 ) – ( 12 . 25 ) + ( 17 . 2020 ) = 500 – 300 + 34340 = 200 + 34340 = 34540 b, mik quên công thức Bài 2 : a, 390 – ( x – 7 ) = 169 : 13 390 – ( x – 7 ) = 13 ( x – 7 ) = 390 – 13 x – 7 = 377 x = 377 + 7 x = 384 Reply
Bài 1 :
a, 4 . $x^{3}$ – 17 . 2$x^{4}$ + 25 . 2020$x^{0}$
= 4 . 125 – 17 . 12 + 25 . 2020
= ( 4 . 125 ) – ( 12 . 25 ) + ( 17 . 2020 )
= 500 – 300 + 34340
= 200 + 34340
= 34540
b, mik quên công thức
Bài 2 :
a, 390 – ( x – 7 ) = 169 : 13
390 – ( x – 7 ) = 13
( x – 7 ) = 390 – 13
x – 7 = 377
x = 377 + 7
x = 384