Question

1. What should be added to 4x3 - 6x² + 7x -12 to get (x2 – 2x +5 )( x + 3)
2. Divide 6x3 – x2 - 6x + 1 by 3x² – 3 Using factorization method.
3. Find the difference between Cl and Si on Rs. 15000at the rate of 10% p.a for 2
years.
4. A cargo truck covers a distance of 1200 km, between two cities A and B, in 5 days.
a. How much time will it take to cover 1440 km at the same speed?
b. How much distance it will in 11 days at the same speed?
5. Mr. Naveen wants to distribute some sweets among children. If there were 120
children, each child will get 4 sweets.
a. Find the number of children if each child got 3 sweets.
b. Find the number of sweets each will get if there are 80 children.
6. Factorise
a. 81x4 - 625y4
b. x² - 6x - 16​

Answer 1

6 ( b) is -23 ,13

Step-by-step explanation:

using formula - b2 +- √ b2 - 4ac / 2 a