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SubjectsMathematics
TOPIC PRACTICE
Up to 2 questions from this page. Select your focus, then start.
\(y^2\) means \(y\times y\). Substituting \(y=4\), we get \(y^2=4^2=4\times4=16\). Option 8 equals \(2y\), not \(y^2\). In such questions, substitute the given value first and then evaluate the power.
View question detailsSubstituting the given values in \(u-v\) gives \(7-2=5\), so option B is correct. Option A results from addition, \(7+2=9\), option C results from multiplication, \(7\times2=14\), and option D is an incorrect subtraction. In an exam, carefully preserve the order of terms because \(u-v\) and \(v-u\) generally have different values.
View question detailsQUIZ COMPLETE
