What should be added to 9x4+2x2+25 to make it a perfect square?
Correct answer: C. -32x2
- A. 32x2
- B. 30x2
- C. -32x2
- D. 14x2
Explanation
Solution: To make it a perfect square consider the algebraic formula, =( 3x2)2+2(3x2)(5)+(5)2 = 9x4+30x2+25 (This makes a perfect square)Add -32x2 to the equation to make it a perfect square. =9x4+2x2-32x2+25 = 9x4-30x2+25
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