Question

SECTION A (2 marks)
1. Check whether (15)" can end with zero for any natural number 'n' Justify
your answer.
2. Find the roots of the quadratic equation 2 x2+673 x - 60 = 0
SECTION B (3 marks)
3. If the zeroes of the polynomial x2-bx+c be in the ratio 2:3, then
prove that 6 b? = 25C
4. Solve the pair of linear equations
2(3u - v)=5 uv
2(u + 3v)=5 uv
SECTION C (4 marks)​

Answer 1

Answer:

Q1

ans . The prime factorization of 15 doesn't have a 2 and 5 as its factor. So, its factorization will never end in 10 as a number ending in 10 must have a factors as 5 and 2. So, 15n will never end in zero as 15 doesn't has 2 as a factor.