Question

Show instructions Question 2 Which of the following is equivalent to the expression below? (x + 5)(2x - 3) Оа 3.r? – 7x - 15 2x2 + 7x - 15 2x² - 7x - 15 3.x2 + 7x - 15 Od

Answer 1

ANSWER

$b)2x^2+7x-15$

EXPLANATION

We want to find the expression that is equivalent to the given expression:

$(x+5)(2x-3)$

To do this, we have to expand the brackets.

That is:

$\begin{gathered} (x\cdot2x)+(x\cdot-3)+(5\cdot2x)+(5\cdot-3) \\ 2x^2-3x+10x-15 \\ \Rightarrow2x^2+7x-15 \end{gathered}$

That is the equivalent expression (Option B).