Questions asked by Ahnaf R

Back to user's profile
How do I find the constant term from a given binomial without expanding the whole expression?
There are two values of m where the line y=mx−1 is tangent to the parabola y=(x−2)^2+4. One of the possible values of m is positive, one is negative. How do I find the positive value of m?
How do I evaluate $\sqrt{x + 10} = \frac{1}{\sqrt{x}} + 10$ $sqrt(x+10)=1/sqrt(x)+10$ to find its real solution(s)?
The tangent line to the graph of $y = 2 x^{2} - 3 x + 1$ $y=2x^2−3x+1$ at the point $P (a, b)$ $P(a,b)$ is parallel to the line $y = 5 x$ $y=5x$ . This tangent line crosses the x-axis at $(d, 0)$ $(d,0)$ . How do I find the value of $d$ $d$ ?
How do I prove that $n \sum i = 1 {(x_{i} - μ)}_{i}^{2} = n \sum i = 1 {(x_{i})}_{i}^{2} - n μ^{2}$ $sum_(i=1)^n(x_i-mu)^2=sum_(i=1)^n(x_i)^2-nmu^2$ ?
How do I find the mean of the data set ${x_1,x_2,....,x_25}$ given that $sum_(i=1)^25x_i^2=2568.25$ and the standard deviation is $5.2$ ?