If 16a2 + 4a - 6 = 0, what is a possible value of a ?
A. -0.75
B. -0.5
C. 0
D. 1
Answer:A
If 16a2 + 4a - 6 = 0, what is a possible value of a ?
A. -0.75 B. -0.5 C. 0 D. 1
Explanation: A Whenever the question asks for a specific value and the answer choices are numbers, think Plugging In the Answers. In (A), a = -0.75. Plug -0.75 in for a in the equation to get 16(-0.75)2 + 4(-0.75) - 6 = 0. Solve the left side of the equation to get 16(0.5625) + (-3) - 6 = 0, or 9 - 3 - 6 = 0. Since, this statement is true, the correct answer is (A).