Algebra, STD2 EQ-Bank 3 MC If \(w=4y^2-5\), what is the value of \(y\) when \(w=43\)? \(3\) \(-3\) \(\sqrt{3}\) \(-2\sqrt{3}\) Show Answers Only \(D\) Show Worked Solution \(\text{When}\ w=43:\) \(w\) \(=4y^2-5\) \(43\) \(=4y^2-5\) \(4y^2\) \(=48\) \(y^2\) \(=\dfrac{48}{4}=12\) \(y\) \(=\pm 2\sqrt{3}\) \(y=-2\sqrt{3}\ \text{(only possibility given options)}\) \(\Rightarrow D\)