75-78 - More on Solving Equations Solve the equation for the variable x. The constants a and b represent positive real numbers. 75. x* – 5ax? + 4a² = 0 76. aʼx³ + b³ = 0 77. Vx + a + Vx – a = V2Vx + 6 78. Va - aVx + bVx – ab = 0

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Equations and Inequations

Equations and inequalities describe the relationship between two mathematical expressions.

Linear Functions

A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.