Multiply out and simplify - OCR - GCSE Maths - Question 17 - 2023 - Paper 1

Question 17

Multiply out and simplify.
(3x + y)(x + 2y)
Worked Solution & Example Answer:Multiply out and simplify - OCR - GCSE Maths - Question 17 - 2023 - Paper 1
Multiply out

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To multiply the two binomials, we use the distributive property (FOIL method):
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First: Multiply the first terms of each binomial:
3ximesx=3x2.
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Outer: Multiply the outer terms:
3ximes2y=6xy.
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Inner: Multiply the inner terms:
yimesx=xy.
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Last: Multiply the last terms:
yimes2y=2y2.
Combining these results gives:
3x2+6xy+xy+2y2
Simplify

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Now, combine like terms:
The terms 6xy and xy are like terms, so we add them:
6xy+xy=7xy
Thus, the expression simplifies to:
3x2+7xy+2y2
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