Answer:
Step-by-step explanation:
Given polynomial is,
x - 1 + 2x³ - 3x⁴ + 5x⁵
2.1) Number of terms in the given polynomial = 5
2.2) Degree of polynomial = Highest exponent of polynomial = 5
2.3) Constant term of the given polynomial = 1
2.4) Polynomial in descending order,
5x⁵ - 3x⁴ + 2x³ + x - 1
2.5) Value of polynomial at x = -1
5(-1)⁵ - 3(-1)⁴ + 2(-1)³ + (-1) - 1 = -5 - 3 - 2 - 1 - 1
= -12
one solution and one only
Below in bold.
Use the elimination method:
a. x + y = 23
x - y = 7
b. Adding the 2 equations eliminates y, so we have
2x = 30
x = 15.
Substitute x = 15 in equation a:
15 + y = 23
y = 23 - 15
y = 8.
Answer x = 15, y = 6.
