Algebra and Applications Test 3

© examsiri.com

Question : 8 of 25

Marks: +1, -0

If

o^2 + op = 40

and

p^2 + op = 60

, what are the values of

o + p

?

$±15$
$±5$
$±10$
$± √10$
None of these

Solution:

o^2 + op = 40

and

p^2 + op = 60

On adding equations (i) and (ii), we get

o^2 + p^2 + 2op = 100

⇒ (o + p)^2 = 10^2

⇒ o + p = ±10

© examsiri.com

Go to Question:

Prev Question

Next Question