Answer:
it took 7 boys 21 days to clear a piece of land.
Number 16- 216
number 17- 180
number 18- 252
Answer:
(2x + 3 + 2√6)(2x + 3 - 2√6)
Step-by-step explanation:
<u>Factorization in steps</u>
- 4x^2 + 12x- 15=
- (2x)^2 + 2*2x*3 + 3^2 - 9 - 15 =
- (2x + 3)^2 - 24 =
- (2x + 3 + √24)(2x+3 - √24) =
- (2x + 3 + 2√6)(2x + 3 - 2√6)
Answer:
600000000000
Step-by-step explanation: