Question

Evaluate 3m² -5n² +1 when m= -3 and n= 1​

Answer 1

3m²- 5n²+1

3(-3)² - 5(1)²+1

3(9)-5(1)+1

27-5+1

27-4

23

hope it helps

Answer 2

$\large\sf\underline{Given:}$

• m = - 3

• n = 1

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$\large\sf\underline{To\:find:}$

• Value of 3m² - 5n² + 1

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‎$\large\sf\underline{Solution:}$

$\sf\implies\:3m² - 5n² + 1$

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• Let's substitute the value of m and n

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‎$\sf\implies\:3(-3)² - 5(1)² + 1$

‎$\sf\implies\:3 \times 9 - 5 \times 1 + 1$

‎$\sf\implies\:27 - 5 + 1$

‎$\sf\implies\:27 + 1 - 5$

‎$\sf\implies\:28 - 5$

$\large{\mathfrak\purple{\implies\:23}}$

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‎!! Hope it helps !!