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<h3>(i) Statement :</h3><h3>To find the value of 3x^3-9x . We need to evaluate the cube of both sides of the given equality, try to write maximum expressions in terms of x and then try to write the left hand side in the form 3x^3-9x .</h3><h3>(only for Explaination) </h3><h3>Steps in Attachment</h3><h3>Last Step = 3x^3 - 9x = 10</h3>
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Answer:
See attached for a "Neat" quadratic formula.
a = -1
b = 2
c = 1
x = [-2 +- sqr root( 4 -4*-1*1)] / -2
x = [-2 +- sqr root( 4 -4*-1*1)] / -2
x = [-2 +- sqr root(8)] / -2
x1 = (-2 +2.8284271247) / -2
x1 = .8284271247 / -2
x1 = -0.41421
x2 = (-2 -2.8284271247) / -2
x2 = ( -4.8284271247) / -2
x2 = 2.4142135624
So the equation has the positive solution of
2.4142135624
Step-by-step explanation:
