The word and in probability implies that we use the ________ rule.
1 answer:
You might be interested in
There are four values, including the unknown value x. The sum of the four values is the given value of the mean, 11.5, multiplied by four. Let S be the sum of the four values. Then we can write:
x = 46 + 5 = 51
The answer is: The value of x is 51.
x = 46 + 5 = 51
The answer is: The value of x is 51.
Answer:
Step-by-step explanation:
From the step given step 6
(b² — 4ac) / 4a² = (x + b/2a)²
Mistake in question it is (x + b/2a)²
Step 7 given
±√(b² —4ac) /2a = x + b/2a
Mistake in question it is over 2a and not 1a.
1. The step taken from step 6 to step 7 is taking square roots of both sides
(b² — 4ac) / 4a² = (x + b/2a)²
Taking square of both sodes
√(b²—4ac) / √4a² = √(x + b/2a)²
√(b²—4ac) / 2a = x + b/2a
This is the required step 7.
Now, subtracting b/2a from both sides
√(b²—4ac) / 2a - b/2a= x + b/2a -b/2a
√(b²—4ac) / 2a — b/2a = x
(√(b²—4ac) — b)/2a = x
x = [—b ± √(b²—4ac)] / 2a
So, this is the required formula method
The discriminant is D = b²—4ac.
