Answer:
Step-by-step explanation:
We have been given an polynomial and we are asked to factor our given polynomial.
We will factor our given polynomial by splitting the middle term in two numbers such that the numbers add up-to -15 and their product will be equal to 36.
We know that -12 and -3 add up-to -15 and their product is 36. So splitting the middle term of our given polynomial we will get,
Therefore, the factored form of our given polynomial is .
The factored form of the polynomial is .
To find the factored form of the polynomial , we can look for two binomials that, when multiplied, give us the original polynomial.
The general form of a quadratic polynomial in factored form is
where and are the roots of the polynomial.
Now, find two numbers whose product is 36 and whose sum is -15.
The numbers that satisfy these conditions are -3 and -12,
since and
Therefore, we can factor the polynomial as:
So, the factored form of the polynomial is .
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5•1=5
Answer:
Multiplication identity
Step-by-step explanation:
We are given that
We have to find which property of real number is used in given expression.
Multiplication identity: It is defined as the number by which multiply any number and get itself.
Then, 1 is multiplication identity.
When we are multiplying 5 with 1 then we get 5.
Therefore, 1 is multiplication identity.
Hence, multiplication property of real numbers is used in given expression.
Speed of father is 40 mph
Given that;
Speed of boy on bicycle = 8 mph
Total time taken by father = 15 min = 0.25 hour
Find:
Speed of father
Computation:
Distance = Speed × Time
So,
Boy's cover distance = Father's cover distance
[(Speed of boy on bicycle)(Time taken by boy)] = [(Speed of father)(Time taken by father)]
[(8)(1 + 0.25)] = [(Speed of father)(0.25)]
[(8)(1.25)] = [(Speed of father)(0.25)]
Speed of father = 10 / 0.25
Speed of father = 40 mph
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