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Expansions (Including Substitution) — MATHEMATICS STD 9 — Question

ICSE BoardEnglish MediumSTD 9MATHEMATICSExpansions (Including Substitution)1 Mark
Question
Expand : $( x + 8 ) ( x + 10 )$
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Answer

$( x + 8 )( x + 10 )$
$= x^2 + ( 8 + 10 )x + 8 x 10$
$= x^2 + 18x + 80$

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