Class 7 maths · N.14 · Simplify expressions
Evaluate expressions with squares
Replace each letter with its value. Put parentheses around negative values.
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Evaluate 5x² + 5 when x = 1.
Answer: 10
Evaluate 2x² + 5 when x = −4.
Answer: 37
Evaluate −4x² − 5 when x = 3.
Answer: -41
Tip: Replace each letter with its value. Put parentheses around negative values.
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