Schofield Park
01/09/2023 · Primary School
Обчислити значення виразу \( (4 c-20)(c+3) \), якщо с = \( =0,5 \)
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Step-by-step Solution
Substitute \( c=0.5 \) into the expression \( (4c-20)(c+3) \).
Evaluate the expression by following steps:
- step0: Evaluate:
\(\left(4c-20\right)\left(c+3\right)\)
- step1: Substitute:
\(\left(4\times 0.5-20\right)\left(0.5+3\right)\)
- step2: Multiply the numbers:
\(\left(2-20\right)\left(0.5+3\right)\)
- step3: Subtract the numbers:
\(\left(-18\right)\left(0.5+3\right)\)
- step4: Remove the parentheses:
\(-18\left(0.5+3\right)\)
- step5: Add the numbers:
\(-18\times 3.5\)
- step6: Multiply the numbers:
\(-63\)
Значення виразу \( (4c-20)(c+3) \) при \( c=0.5 \) дорівнює -63.
Quick Answer
Значення виразу \( (4c-20)(c+3) \) при \( c=0.5 \) дорівнює -63.
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