Find the factors of quadratic equation x2 -9x +20 = 0?
(x+4)(x+5)
(x+4)(x-5)
(x-4)(x+5)
(x-4)(x-5)
(x+2)(x+10)
Two times of a natural number is subtracted from its square and the result is 35. Find the number.
5
7
9
6
8
If is a cube root of unity, then the value of _____.
16
32
48
-32
If is an imaginary cube root of unity, then for , the value of is _____.
-1
0
1
3
_____.
1
is equal to _____.
– 64
– 32
– 16
/
– 1
0
9
i
If then x = _____.
None of the above
Assertion(Reason
A: Greatest coefficient in the expansion of (1+5x)8 is 8C4 54. R: Greatest coefficient in the expansion of (1+x)2n is the middle term.
Both A and R are true and R is correct explanation of A
Both A and R are true and R is not correct explanation of A
A is true, R is false
A is false, R is true