you probably meant:
3.8x^4 − 1.7x^2 = 2.8
multiply each term by 10
38x^4 - 17x^2 - 28 = 0
let y =x^2
38y^2 - 17y - 28 = 0 , since b^2 - 4ac is not a perfect square, it will not factor
so
y = (17 ± √4545)/76 = ...
reject the negative answer,
take √ of the positive result, for ± x
Find the real solutions of the equation. (Round your answers to three decimal places. Enter your answers as a comma-separated list.)
3.8x4 − 1.7x2 = 2.8
2 answers
A motor car is uniformly retarded and brought to rest form a speed of 108km/h in 15 seconds.find its retardation
2 answers