Question

Zero of the polynomial P (x) = 2x+5 is_________ a) -2/5 b) -5/2 c) 2/5 d) 5/2 SECTION – B II. ANSWER THE FOLLOWING :- (3x2=6) 11. Add 2✓2 + 5✓3 and ✓2 - 3✓3 12. Rationalize the denominator of ✓ ✓ 13. If x=2 is a root of the polynomial f(x) = 2x²-3x+7a, find the value of ‘a’? SECTION – C III. ANSWER THE FOLLOWING :- (4x3=12) 14. Simplify ✓72 + ✓800 - ✓18 15. If x = 2 +✓3, find 16. Expand (i) (x + 2y + 4z)² (ii) (2x - 5y)² 17. Evaluate by using Identities (i) 99 x 99 (ii) 103 x 97 SECTION – D IV. ANSWER THE FOLLOWING :- (3x4=12) 18. Find the values of 'a' and 'b' ✓ ✓ = a + b✓2 19. Factorize 2y³+y²-2y-1 20. Determine the value of 'a' for which the polynomial 4x⁴- ax³ + 2x² + 4x + 3 is divided by (1-2x) *** ​

Answer 1

Step-by-step explanation:

Section A=b. section B if x=2 then f(x)=2(x)2-3x+7a then a=? 2(2)2-3(2)+7a. 8-6+7a=2+7a 7a= -2. a=-2/7