Question

e the
1
called a que
number a i
2
+ ba + c
quadratic
solve a q
(1) Clear
(ii) Factor
iii) Put ea
2
3
Solve the following (1 to 12) equations :
(on x2 - 11x + 30 = 0
(i) 2x2-5x = 0
(i) 6 + x = x2
4 (i) 3x2 = 2x + 8
5 (i) x (2x + 5) = 25
6 (i)(2x + 3) (x – 4) = 6
() 4x2 + 4x + 1 = 0
(ii) 4x2 – 25 = 0.
(i) x2 - 2x = 48.
(ii) 2122 - 3x + 1 = 0.
(int) 4x2 + 15 = 16x.
+3) (x – 3) = 40.
ii) (3x + 1) (2x + 3) = 3.
(ii) (x – 4)2 + 52 = 132
1
-x-1=0.
7
8
(i) 21x2 = 4 (2x + 1)
(ii) x2-x-1=​

Answer 1

x

2

−11x+30=0

⇒x

2

−5x−6x+30=0

⇒x(x−5)−6(x−5)=0

⇒(x−6)(x−5)=0

So x=5,6.