A quadratic equation that has 2 roots that are equal means that the discriminant of the equation is 0. The value of k that makes the equation have 2 real and equal roots is
Given that:
Rewrite as:
A quadratic equation is represented as:
By comparison:
If an equation has 2 real and equal roots, then:
So, we have:
Divide by 4
Divide by 6
Subtract 2 from both sides
Take LCM
Divide by 2
Hence, the value of k that makes the equation have 2 real and equal roots is
Read more about real and equal roots at:
brainly.com/question/2535040
Answer:
A- -4/7
B- 2/7
C- 1
A = bh/2
A = 2.4 x 3 / 2
A = 7.2 / 2
A = 3.6 m²
They will need 4 bags of pebbles.
Answer:
$33.60
Step-by-step explanation:
Note that "full price" is 1.00($42.00) = $42.00.
"20% discounted price is 0.80($42.00) = $33.60. This is the sale price.
The discount is 0.20($42.00) = $8.40 (but we weren't asked for that).