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Expand 4x(x+2)

For this type of question, we always simply take the term outside the bracket and multiply it with the terms inside the bracket sequentially. So, first we evaluate 4x * x, which gives us 4x 2 . Next, we eval...
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Answered by Callum C. • Maths tutor
6611 Views

3kg of oranges cost £54. 5kg of apples cost £60. Nina buys 2kg of oranges and 7kg of apples. How much does Nina Pay

First lets start with calculating how much 2kg of oranges cost (we do this by cross multiplying):so if 3kg = £54 2kg = £xto determine the value of x, we can write the following equation:3x = 54 23x = 108x = ...
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Answered by Aditi B. • Maths tutor
4579 Views

Solve 5(x + 3) < 60

Firstly multiply out the brackets. This would equal 5x + 15 &lt; 60. Now move all the x terms onto one side and all the constants on to the other side. You can do this be doing minus 15 to both sides. 5x &lt...
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Answered by Aadya S. • Maths tutor
4737 Views

How do you complete a square

If you are given the equation y = x 2 +4x+1 First you determine what is in the squareMake sure your x 2 term has no coefficientFind half the coefficient of the x termThat is your bracket term in this case - ...
JR
Answered by Joshua R. • Maths tutor
3372 Views

show that f(x)=cos(x) is even and what is its graphical property

If the function is even, f(x) = f(-x).cos(-x) is the same value as cos(+x) therefore the function is even. Its graphical property is that it is symmetrical about the y axis as all even functions are.
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Answered by Matthew P. • Maths tutor
6410 Views