Answer:
Step-by-step explanation:
we have the expression:
We need to multiply the two terms in the first parenthesis by the two terms in the second parenthesis:
we solve each term taking into account the law of signs
(-)(-)=+
and
(+)(-)=-
also for the first term we use that
thus we have:
it can be simplified a little more if we factor an r of the second and third term:
Answer:
20 gallons
Step-by-step explanation:
Divide 120 miles by 8 to find miles per gallon
120 ÷ 8 = 15 miles per gallon
Now divide 300 miles by 15 to find number of gallons required
300 ÷ 15 = 20
20 gallons are required for a journey of 300 miles
Answer:
Quadratic
Step-by-step explanation:
This is because quadratic equations require a variable squared. Most numbers have two square roots, a positive and a negative. So, the implementation of (variable)² in an equation will most likely have x ± (variable) as an answer.
the roots are and
Step-by-step explanation:
here we use Shridhar acharya formula
if a + bx +c = 0 is the quadratic equation
the the roots are , and
comparing with the equation we get a=1 b= -7 c = -3
hence the roots are and
= and
area of rectangle = L x W
area = 2 * 1.25 = 2.5 square meters
cutting along the diagonal makes a triangle
area = 1/2 x 2.5 = 1.25 square meters