what is the factored form of the expression x^2 + 13x + 42?
(x + 6)(x + 7)
what is the factored form of the expression 9x^2 - 24x + 16?
(3x - 4)^2
what are the solutions to the equation x^2 + 3x - 28 - 0?
4, -7
what are the zeros of the function f(x) = x^2 + 8x + 16?
-4 only
what are the solutions of the equation (x + 16)^2 = 28?
x = -16 � 2?7
anna solved the equation (x + 4)^2 = 2 using the following steps. which statement identifies a mistake anna made, if any?
she did not make a mistake. her answer is correct.
solve the quadratic equation x^2 + 3x - 10 = 0 by completing the square. what is the solution, or what are the solutions, to the equation?
2, -5 (it says it's wrong on the test when it is right? it don't make sense) (maybe space the numbers)
use the quadratic formula, to solve the equation 5x^2 + 8x + 1 = 0. match each step to the correct method for solving the equation.
step 1: x = -8 � ?8^2 - 4(5)(1) / 2(5)
step 2: x = -8 � ?64 - 20 / 10
step 3: x = -8 � ?44 / 10
step 4: x = -8 � 2?11 / 10
step 5: x = -4 � ?11 / 5
which expression represents the number 3 + ?-4 rewritten in a + bi form?
3 + 2i
for the number 18, what is the value of a and b?
a = 18 and b = 0
lupita completed the square to solve the equation 0 = x^2 - 6x + 13 as follows. did lupita make a mistake? if so, where did the mistake occur, and what was it?
yes, in step 3, she should have added 9 to both sides of the equation.
marcus used the quadratic formula, to solve the equation 0 = x^2 + 5x + 17 as follows. did marcus make a mistake? if so, where?
yes, in step 1, he should have written 2(1) instead of 2(5) because a = 1.
which expression is equivalent to (2 - ?-4) + (1 + ?-49)?
3 + 5i
which expression is equivalent to (2 - 7i) - (-3 + 2i)?
5 - 9i
given the complex numbers l and m below, what is l - m?
l = 3 + 8i
m = 2 - 14i
1 + 22i
which expression is equivalent to (2 - 3i) + (2 + 7i)?
4 + 4i
which expression or value is equivalent to (8 + 2i)(8 - 2i)?
68
which simplifications of the powers of i are correct? select all that apply.
i^7 = -i
i^16 = 1
which expression is equivalent to (4 + 6i)(2 + 8i)?
-40 + 44i
which expression is equivalent to 4i(3 + 9i)?
-36 + 12i
which expression represents the number 2i^4 - 5i^3 + 3i^2 + ?-81 rewritten in a + bi form?
-1 + 14i
which expression represents the number 2 + 5i - i(3 - 6i) rewritten in a + bi form?
-4 + 2i