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13-03-2021
Mathematics

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441-p²=(21)²-(17)²
maths algebra

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13-03-2021

Step-by-step explanation:

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13-03-2021

Answer:

p = 17

Step-by-step explanation:

→ Expand out (21)² - (17)²

21² = 441 and 17² = 289 therefore 441 - 289 = 152

→ Plug value back into equation

441 - p² = 152

→ Minus 441 from both sides

- p² = -289

→ Square root both sides

p = 17

Answer Link

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