Question

Who will put correct answers i will mark as Brainliest ​

Answer 1

Answer:

4. a) 103 × 104

( 100 + 3 ) (100 + 4) = (100)² + ( 3 +4 )100 + 3×4

10000 + 700 + 12

10712

b) 5.1 × 5.2

( 5.0 + 0.1) ( 5.0 + 0.2) = (5.0)² + ( 0.1 + 0.2 )0.5 + 0.1 × 0.2

25 + 0.15+ 0.02

25.17

3. a) ( 3x + 7)² - 84x = ( 3x - 7)²

LHS

9X² + 49 + 42X - 84X

9X² + 49 - 42X

( 3X - 7 )²

LHS = RHS

b) ( 9P- 5Q )² + 180PQ = (9P + 5Q)²

LHS

81P² + 25Q² - 90PQ + 180PQ

81P² + 25Q² + 90PQ

( 9P + 5Q )²

LHS = RHS