Mathematics · Quadratic Equations
If a is a positive integer such that the equations (a2 − 7a)x2 + x + 12 = 0 and 240x2 + 8x + (a2 − 4) = 0 both have common roots, then the value of (a + 2)(a + 3)a − 4 is:
- 142
- 218
- 330
- 426✓
Correct answer
26
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