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Expand the brackets: (x-3)(x+4)

First Multiply x by (x +4) Next multiply -3 by(x+4) Then simplify the sum : x 2 +4x-3x-12 Hence the answer is : x 2 +x-12
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Answered by Anthony N. • Maths tutor
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1. Find the value of the missing edge to 2 decimal places 2. Find the angle θ to 2 decimal places

The triangle is a right angled triangle with hypotaneuse y, and sides are 7 and 10. The angle θ is between the hypotaneuse and the side of length 10 (I do have a diagram) For question 1: Using Pythagoras’ Th...
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Answered by Amelia C. • Maths tutor
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How does differentiation work?

Differentiation is essentially a method of finding the gradient of a function. To put that in better terms, imagine you have a graph of y=x, this is a straight line which means the gradient will always be th...
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Answered by Anthony G. • Maths tutor
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What is the sum of 3/5 and 7/8?

First of all we need to find a common denominator. This is the smallest number that can be divided by both 5 and 8, which is 40. 24/40 + 35/40 Method: 5 goes into forty 8 times and so we must multiply the 3 ...
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Answered by Benjamin R. • Maths tutor
9466 Views

For the following right angled triangle find the value of x to 1 dp.

x/4 = cos(50 o ) x = 4cos(50 o ) x = 2.6cm (1dp)
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Answered by Angus P. • Maths tutor
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