Question

if n=-2 find thevalue of 5n2+5n-2​

Answer 1

Answer:

if n = -2 then

${5n}^{2} + 5n - 2$

${5 \times - 2}^{2} + 5( - 2) - 2$

$= 5 \times 4 + 10 - 2$

$= 20 + 10 - 2$

$30 - 2$

$= 28$

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Answer 2

5n^2+5n-2 =f(n)

f(-2)=5(-2)^2+5(-2)-2

=5(4)-10-2

=20-12

=8

if n=-2 then the value of 5n^2+5n-2 is 8

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