Question
If $a=2$ and $b=3$, find the value of: $5 a^2-2 a b$
✓
Answer
Substituting $a =2$ and $b =3$ in the, given expression,we get:
$5 a^2-2 a b=5 \times(2)^2-2 \times 2 \times 3$
$=5 \times 4-4 \times 3$
$=20-12=8$
$5 a^2-2 a b=5 \times(2)^2-2 \times 2 \times 3$
$=5 \times 4-4 \times 3$
$=20-12=8$
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