Question

[Vũ Đỗ Phương Nguyên]

tìm x

a) x3 + 3x = 12.11

b) x04 + 40x = 101.11

Answer 1

[Bạch Lam Anh]

a, x3 + 3x = 12.11

<=> x . ( 3 + 3 ) = 132

<=> x . 6 = 132

<=> x = 132 : 6

<=> x = 22

b, x04 + 40x = 101.11

<=> x . ( 4 + 40 ) = 1111

<=> x . 44 = 1111

<=> x = 1111 : 44

<=> x = 25,25

Answer 2

[tran pham bao thy]

a) x3+3x=12.11

    3x+3x=132

      6x=132

        x=132:6

        x=22