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Expand and simplify (6x - 2y)(3x - 7y)

Expand brackets: 18x^2 - 42xy - 6xy + 14y^2 Simplify: 18x^2 - 48xy + 14y^2 3 marks
BW
Answered by Beth W. • Maths tutor
6657 Views

How many thirds are there in 9?

A third is exactly how it sounds: 1 piece out of 3 pieces of one number. If you imagine a cake is cut into 3 slices, one third would be one of those slices. This means that we have 3 thirds in any whole numb...
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Answered by Rachel B. • Maths tutor
45589 Views

Differentiate y=(x^2+5)^7

In this example instead of multiplying out 7 brackets it is useful to use the chain rule, which is used to differentiate the composition of more than one function. If we let what is inside the bracket equal ...
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Answered by Rachel B. • Maths tutor
6849 Views

Factorise and solve x^2 - 8x + 15 = 0.

The easiest method to solve quadratic equations by hand is by factorisation - which means putting the equation into brackets, effectively expressing the equation as a product of two linear expressions. Imagi...
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Answered by Rachel B. • Maths tutor
4755 Views

Why would you like to study English at Unviversity?

Since I have been able to talk, the manipulation of language has fascinated me. I have explored my interest in literature beyond the A level syllabus, developing on my studies of victorian literature through...
HM
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