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You can use estimation to work out the answer to this question. 21.7 × 9.4 is approximately 22 × 10 = 220. The answer will be the option that is closest to 220, which is option D.
Since there is no further factorisation possible we use the quadratic formula x=[-b±√(b2-4ac)]/2a. From the equation in question we have a=3, b=-7, c=3. Substituting into the quadratic formula...
We are required to solve this integral using integration by substitution, in which we assign a variable to equal a certain region of the integrated function in this case, 4x-1. The purpose of this is to r...
2x2 - x - 6 = 0
This must first be factorised - I use the 'box method' when the reciprocal of x2 is >1. This is difficult to explain via writing but it inv...
Parametric equations will have both the x and the y coordinates expressed in terms of another paramater, usually t. Gradients of curves are expressed in the form of an equation of dy/MWAnswered by Mollie W. • Maths tutor4580 Views
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