Double brackets (OCR GCSE Maths): Quizzes

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Double brackets
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What does the acronym FOIL stand for?

First, Outer, Inner, Last

What type of expression is created when expanding double brackets?

A quadratic expression

In the FOIL method, what does the 'First' step involve?

Multiply the first terms in each bracket

In the FOIL method, what does the 'Last' step involve?

Multiply the last terms in each bracket

What must you include when multiplying terms in double brackets?

The signs (+ or -)

What is (a+6)(a+4)(a+6)(a+4) when expanded?

a2+10a+24a^2+10a+24

What is (p+10)(p8)(p+10)(p-8) when expanded?

p2+2p80p^2+2p-80

What is (m7)(m9)(m-7)(m-9) when expanded?

m216m+63m^2-16m+63

What is the first term in an expanded double bracket expression?

Square of the first term in brackets

Why is (a7)2=a249(a-7)^2 = a^2-49 incorrect?

It neglects the middle term

What is (a7)2(a-7)^2 when expanded correctly?

a214a+49a^2-14a+49

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