A2 Exam review ch 1-3 24/25

Front

Simplify: (10 + 15i) - (48 - 30i)

Back

-38 + 45i

Front

What does i² equal?

Back

-1

Front

Which parent function matches the graph? y = x²

Back

y = x²

Front

What do we call the highest or lowest point of a quadratic?

Back

vertex

Front

If given the equation y = (x + 5)² - 4, what is the vertex of the parabola?

Back

(-5, -4)

Front

What is the standard form of a quadratic equation?

Back

y = ax² + bx + c

Front

What is the discriminant in a quadratic equation?

Back

b² - 4ac

Front

How do you find the vertex of a parabola in standard form?

Back

x = -b/(2a) and then substitute x to find y.

Front

What is the axis of symmetry in a quadratic function?

Back

x = -b/(2a)

Front

What is the vertex form of a quadratic equation?

Back

y = a(x - h)² + k, where (h, k) is the vertex.