Question

2)
From the following equations, which one is the quadratic equation?
(A) - 3 = x
(B) x(x + 5) = 4
(C)n-1= 2n
(D)(x+2) = x
x²
)
For simultaneous equations in variables x and y, if Dx = 49, Dy = -63
D = 7, then what is the value of x?
(A) 7
(B) -7
(C)
D
)
then n(S) = ?
5
If n(A) = 2, p(A) =
(A) (B)
2
5
(C) 10
(
D)
3​

Answer 1

Answer:

quadratic equation is B x^2 +5x = 4

Step-by-step explanation:

general from of quadratic equation is ax^2 +bx +c = 0

and your second question is Dx = 49 if D = 7 then value of X =?

DX = 49 putting value of D we will get

7X = 49

now divide both sides by 7

• 7x/7 = 49/7
• X = 7