If px square - 2√5px 15=0 has two equal roots then find the value of ...
**Solution:**
Let's solve the equation step by step to find the value of p.
**Step 1:**
Given equation: px^2 - 2√5px + 15 = 0
**Step 2:**
To determine if the equation has two equal roots, we need to find the discriminant (D) of the quadratic equation. The discriminant is given by the formula:
D = b^2 - 4ac
Where a, b, and c are the coefficients of the quadratic equation in the form ax^2 + bx + c = 0.
In our equation, a = p, b = -2√5p, and c = 15.
**Step 3:**
Substituting the values of a, b, and c into the discriminant formula:
D = (-2√5p)^2 - 4(p)(15)
**Step 4:**
Simplifying the expression:
D = 20p^2 - 4(15p)
D = 20p^2 - 60p
**Step 5:**
For two equal roots, the discriminant must be equal to zero.
Setting the discriminant equal to zero:
20p^2 - 60p = 0
**Step 6:**
Factoring out the common factor of 20p:
20p(p - 3) = 0
**Step 7:**
Using the zero-product property, we set each factor equal to zero:
20p = 0 or p - 3 = 0
**Step 8:**
Solving each equation:
For 20p = 0:
p = 0
For p - 3 = 0:
p = 3
**Step 9:**
Therefore, the values of p that satisfy the condition of the equation having two equal roots are p = 0 and p = 3.
If px square - 2√5px 15=0 has two equal roots then find the value of ...