If P + Q = 8 and P - Q = 4, Find: P2 + Q2 - Mathematics

If p + q = 8 and p - q = 4, find:
p²+ q²

बेरीज

Putting pq = 12 in (i) we get :
p² + q²
= 64 - 2(12)
= 64 - 24
= 40.

shaalaa.com

या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?

पाठ 4: Expansions - Exercise 4.1

पाठ 4 Expansions
Exercise 4.1 | Q 12.2

Factorise the following:

`27p^3-1/216-9/2p^2+1/4p`

Simplify the following:

322 x 322 - 2 x 322 x 22 + 22 x 22

If x = −2 and y = 1, by using an identity find the value of the following

Find the square of 2a + b.

Find the square of : 3a + 7b

Use identities to evaluate : (101)²

If a - `1/a`= 8 and a ≠ 0 find :
(i) `a + 1/a (ii) a^2 - 1/a^2`

Use the direct method to evaluate the following products:

(a – 8) (a + 2)

Expand the following:
(a + 3b)²

If p² + q² + r² = 82 and pq + qr + pr = 18; find p + q + r.