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20 MCQs in this category · 4 topics
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Explanation: The discriminant of a quadratic ax² + bx + c is D = b² - 4ac. If D > 0, two real roots; D = 0, one repeated root; D < 0, no real roots.
Explanation: Polynomials are named by degree: degree 1 = linear, degree 2 = quadratic, degree 3 = cubic, degree 4 = quartic, degree 5 = quintic.
Explanation: A quadratic equation has the form ax² + bx + c = 0. y = x² + 4x + 4 is quadratic (highest power is 2). Linear has power 1; cubic has power 3.
Explanation: 2x + 3 = 11 ? 2x = 11 - 3 ? 2x = 8 ? x = 4. Always subtract constants from both sides first, then divide.
Explanation: Compound interest is calculated as A = P(1 + R/100)^T where P=principal, R=annual rate, T=time in years. CI = A - P.
Explanation: The sum of the interior angles of any triangle is always 180°. This is a fundamental theorem in Euclidean geometry.
Explanation: The Highest Common Factor (HCF) of 18 and 24 is 6. Factors of 18: 1,2,3,6,9,18. Factors of 24: 1,2,3,4,6,8,12,24. The highest common factor is 6.
Explanation: 25% of 400 = (25/100) × 400 = 0.25 × 400 = 100. A quick way: 25% = 1/4, so 400 ÷ 4 = 100.
Explanation: The Least Common Multiple (LCM) of 4 and 6 is 12, the smallest number divisible by both. Multiples of 4: 4,8,12... Multiples of 6: 6,12...