Question

Q.1 ∆ PQR is an equilateral triangle such that PS ⊥QR, then (PS)² =? *

2 points

3/2 (PS)²

3(RS)²

2PR²

4PR²

Q.2 The factors of m²+16m+63 are *

2 points

(m-9)(m-7)

(m-9)(m+7)

(m+9)(m-7)

(m+9)(m+7)

Q.3 The distance between the tops of two trees 20 m and 28 m high is 17 m. The horizontal distance between the trees is *

2 points

11 m

15 m

30 m

12 m

Q.4 Factorise 25a²-4b²+28bc-49c² *

2 points

(5a+2b-7c)(5a-2b+7c)

(5a+2b+7c)(5a+2b-7c)

(5a-2b-7c)(5a+2b+7c)

(5a+2b+7c)²

Q.5 A ladder of length 5 m leans against a wall so that the top of the ladder is 3 m above the ground level. How far is the bottom of the ladder from the wall? *

2 points

5 m

4 m

3 m

2 m

Q.6 Factorise 5x⁴+x²-6 *

2 points

(5x²-6)(x+1)(x-1)

(5x²+6)(x+1)²

(5x²+6)(x+1)(x-1)

(5x²-6)(x²+1)

Other:

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Answer 1

Answer:

1st :-

(PQ)2 + (QS)2

Step-by-step explanation:

hope its is right