Standard A.REI.4 – Solve quadratic equations in one variable.

A.REI.4b – Solve quadratic equations by inspection (e.g., for *x*^{2} = 49), taking square roots, completing the square, the quadratic formula and factoring, as appropriate to the initial form of the equation. Recognize when the quadratic formula gives complex solutions and write them as *a* ± *bi* for real numbers *a* and *b*.

Vocabulary for this standard:

EngageNY lesson link – This appears in the Fourth module of the EngageNY curriculum.

Quick thoughts:

A

**base**is a number or expression being multiplied in an exponentAn

**exponent**is a number that describes how many times to use the number in a multiplication.A

**coefficient**is a number used to multiply a variable.A

**negative exponent**expresses that the base is the denominator of a fraction instead of the numeratorThe

**multiplicative property of exponents**says that when you multiply powers with the same base you just have to add the exponentsThe

**division property of exponents**says that when you divide powers with the same base you just have to subtract the exponentsThe

**power of a power property**says that when you raise an exponent to another power, you just have to multiply the exponentsVocab

- Kahoot
- Quizizz
- Quizlet

Instruction:

- Desmos

Drills:

- Quizizz
- Kahoot
- Formative