The Difference of Square: a^2 - b^2 = (a + b)(a - b) Sara did a question as: 2x^2 - 2y^2 = (2x + 2y)(2x - 2y).

What's wrong with Sara's work? How to fix it?

Step-by-step explanation:

Given

Difference of two squares:

Sara Solution to a question:

Required

State what's wrong with Sara's work

How to fix it

In Sara's solution, the coefficient of x and y is 2. Sara's solution is wrong because she included the coefficients of x and y when converting the expression to difference of two squares.

To fix this, the very first thing that needs to done is to factorize the given expression (as follows)

Then the difference of two squares can be applied on the expression in bracket. This gives

i am unable to solve this problem

step-by-step explanation:

required rate of return = 0.166 = 16.6%

step-by-step explanation:

under the capital asset pricing model (capm), the required or expected rate of return for a particular security or asset is given using the formula:

required rate of return = risk-free rate + beta*(market risk premium)

we are given that;

risk-free rate = 4% = 0.04

beta = 1.4

market risk premium = 9% = 0.09

we simply plug these values into the above formula;

required rate of return = 0.04 + 1.4*(0.09)

required rate of return = 0.04 + 0.126

required rate of return = 0.166 = 16.6%