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Basic Math
Arithmetic
Fractions & Decimals
Ratios & Proportions
Percentages
Basic Number Theory
Pre-Algebra
Integers & Absolute Values
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Prime Factorization
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Functions & Graphs
Systems of Equations
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Unit Circle
Graphing Trigonometric Functions
Calculus
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Example
3(r+2s)=2t-4
a⋅(b-2)=3b
3(r+2s)=2t-4
a⋅(b-2)=3b
Question
$$(-7) \times (-3)$$
Evaluate
$21$
Solution Steps
Multiply $-7$ and $-3$ to get $21$.
$$21$$
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Factor
$3\times 7$
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