Manipulation Of Quadratic Expressions
Akopọ
Quadratic expressions appear everywhere in mathematics, from modelling projectile trajectories to optimising areas and profits. Mastering the art of reshaping them through factorisation and completing the square gives you direct access to a quadratic's roots, vertex and symmetry, all without reaching for the formula.
In this topic you will learn two powerful rewriting techniques: factorising a quadratic into a product of linear factors and completing the square to reveal the turning point. Both are essential tools for the rest of the 4PM1 course and appear frequently in Edexcel exam questions.
Awọn Afojusun
- Factorise quadratic expressions
- Complete the square for quadratic expressions
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- What is the factorised form of x^2 + 7x + 10? A) (x + 2)(x + 5) B) (x + 1)(x + 10) C) (x - 2)(x - 5) D) (x + 3)(x + 4) Answer: A
- Which expression is equivalent to (x + 4)^2 - 9? A) x^2 + 8x + 7 B) x^2 + 8x + 25 C) x^2 + 4x + 7 D) x^2 + 16x + 7 Answer: A
- What is the vertex of the parabola y = (x - 3)^2 + 2? A) (3, 2) B) (-3, 2) C) (3, -2) D) (-3, -2) Answer: A
- Factorise 9x^2 - 16. A) (3x + 4)(3x - 4) B) (9x + 4)(x - 4) C) (3x + 8)(3x - 2) D) (3x - 4)^2 Answer: A
- When completing the square for x^2 - 12x + 5, what value is subtracted inside the bracket? A) 36 B) 12 C) 6 D) 144 Answer: A
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Ẹ̀kọ́ síwájú láti àwọn orísun ṣíṣí
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Abala ìwé ẹ̀kọ́
Quadratic Equations
Solve quadratic equations by factoring.
"College Algebra: Quadratic Equations" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/college-algebra/pages/2-5-quadratic-equations. Access for free at https://openstax.org/books/college-algebra/pages/1-introduction
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