Question

) 5p2 - 692 - 7r2 + 6p2 - 5q2 + 2r? simplyfy the expression find their value if p = -1 , q = 1 , r = 2:
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Answer 1

Answer:

5p² - 692 - 7r² + 6p² - 5q² + 2r

p = -1, q = 1, r = 2

=> 5(-1)² - 692 - 7(2)² + 6(1)² - 5(1)² + 2(2)

=> 5 - 692 - 28 + 6 - 5 + 4

=> -710

Answer 2

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5p² - 692 - 7r² + 6p² - 5q² + 2r? simplyfy the expression find their value if p = -1 , q = 1 , r = 2:

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$5p² - 692 - 7r² + 6p² - 5q² + 2r$

$p = - 1 \\ q = 1 \\ r = 2$

$= 5 {( - 1)}^{2} - 692 - 7 {(2)}^{2} + 6 {( - 1)}^{2} - 5 {(1)}^{2} + 2(2)$

$= 5(1) - 692 - 7(4) + 6(1) - 5(1) + 4$

$= 5 - 692 - 28 + 6 - 5 + 4$

$= 15 - 725$

$= - 710$

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