Answer:
a = - 2 , a = 6
Step-by-step explanation:
a² - 4a - 12 = 0
consider the factors of the constant term (- 12) which sum to give the coefficient of the a- term (- 4)
the factors are + 2 and - 6, since
+ 2 × - 6 = - 12 and + 2 - 6 = - 4
use these factors to split the a- term
a² + 2a - 6a - 12 = 0 ( factor the first/second and third/fourth terms )
a(a + 2) - 6(a + 2) = 0 ← factor out common factor (a + 2) from each term
(a + 2)(a - 6) = 0 ← in factored form
equate each factor to zero and solve for a
a + 2 = 0 ( subtract 2 from each side )
a = - 2
a - 6 = 0 ( add 6 to both sides )
a = 6
solutions are a = - 2 , a = 6
Step 2: x = 30 – 5
Step 3: x = 25
Part A: Is Charlie's solution correct or incorrect? If the solution is incorrect, explain why it is incorrect and show the correct steps to solve the equation. (6 points)
Part B: How many solutions will this equation have? (4 points)
Part A: Charlie's answer is incorrect. Part B: There is only 1 solution for this equation.
A linear equation is an equation that has the variable of the highest power of 1.
The standard form of a linear equation is of the form Ax + B = 0.
Charlie solved an equation;
Step 1: 5x = 30
Step 2: x = 30 – 5
Step 3: x = 25
Part A: Charlie's answer is incorrect.
In step 2 of Charlie's answer he subtracted 5 from each side. Since 5x is multiplication so, he must divide each side by 5 to get x by itself.
Step 1: 5x = 30
Step 2: x = 30/5
Step 3: x = 6
Part B: There is only 1 solution for this equation.
Learn more about linear equations;
#SPJ2
g(x) = x^2 8x 16
In which direction and by how many units should f(x) be shifted to obtain g(x)?
Standard Deviation:________ a1