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05-04-2020
Mathematics

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Solve the equation 4x^2+4x-2=7x to the nearest tenth.

Respuesta :

MathPhys MathPhys

05-04-2020

Step-by-step explanation:

4x² + 4x − 2 = 7x

4x² − 3x − 2 = 0

Solve with quadratic formula:

x = [ -(-3) ± √((-3)² − 4(4)(-2)) ] / 2(4)

x = [ 3 ± √(9 + 32) ] / 8

x = (3 ± √41) / 8

x ≈ -0.43 or 1.18

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