Answer:
x = ±2
Step-by-step explanation:
Given :
y = 64 - 16x²
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Add 16x² to each side (take y = 0) :
⇒ 0 + 16x² = 64 - 16x² + 16x²
⇒ 16x² = 64
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Divide both sides by 16 :
⇒ 1/16 × 16x² = 1/16 × 64
⇒ x² = 4
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Taking square root on both sides :
⇒ √(x²) = √4
⇒ x = ±2
