════════ ∘◦❁◦∘ ════════
Answer = 59
════════════════════
Known
f(x) = 2x² + 9
════════════════════
Question
f(-5) = ?
════════════════════
Way to do
#as you the x inside the (x) changed into (-5) it means that you need to change the x into -5.
f(-5) = 2(-5)² + 9
= 2 × 25 + 9
= 50 + 9 = 59
#So f(-5) = 59
════════════════════