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This week we learned how to graph quadratic equations, which is an expansion of what we have learned so far. The general form of the equation of a quadratic function: Vocabulary Parabola: the curve of every quadratic function on the graph Vertex: the highest or lowest point of the parabola Minimum point: the lowest point(vertex)…
This week of math we learned about discrinants and In the quadratic equation, the discriminant tells us the number of real solutions. We can find the discriminant by plugging in the correct numbers of the quadratic equation into the radicand of the quadratic formula. quadratic formula: radicand of the formula: – 4ac discriminant is a…
This week, we learned how to solve quadratic equations by factoring, completing the square, and using the quadratic formula. Factoring Factoring and using the zero product property is one of the easiest ways to solve a quadratic formula, and it works with rational roots. A quadratic equation is any equation that can be written in the…
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This week in pre-calculus 11, we reviewed and extended our understanding of factoring polynomials. To remember the steps of factoring polynomials is simple. Just remember can divers pee easily underwater:) Common GCF (remainder) Difference of squares Pattern Easy (when the variable doesn’t have a coefficient) Ugly (if the variable has a coefficient) examples:
This week in precalculus we learned how to solve redical equations. There are rules to remember when multiplying and dividing radical expressions. Multiplication: 1) It is recommended to simplify first, because it is easier to simplify the smaller number 2) Remember to use the distributive property (FOIL aka the claw method) Division: 1) There should…
On the third week of precalculus, we began a new unit on absolute value. Absolute value is the principal square root of a number, and it is the distance of the number from zero. The absolute value of | -7 | and | 7 | are both 7. Example: -| 5-9×3 | *remember to use…
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On the second week of precalculus 11, we learned about geometric sequences and series. In a geometric sequence, each term is multiplied by a constant, known as the common ratio(r). Geometric Sequences: 7,14,28,56,112.. = () = 7 () = 7(512) = 3584 Geometric Series: 4+12+36+108+324.. Sn= a( – 1) / r- 1 = 4 ( -1)…
-17, -11, -5, 1, 7… = + (n- 1)d = -17+ (50- 1)6 = -17+ (49)6 = -17+ 294 = 277 Sn= (2 + (n-1)d) Sn= (2(-17)+(50-1)6) Sn= 25(-34+(49)6) Sn= 25(-34+294) Sn= 25(260) Sn= 6500