If x = 6 and y = −2, find the value of
(a) x²
(b) 5x + y
(c) x + y²
I'll do a) for you, then I will check b) and c) once you have tried them.
a) x^2
= (x)(x) and since x = 6 sub it in and evaluate
= (6)(6)
= 36
Your turn...
28 and 2
-2x-2 =-4
To find the value of each expression given the values of x and y, we simply substitute the given values into the expressions and perform the necessary calculations.
(a) x²:
To find x², we square the value of x. Given that x = 6, we calculate:
x² = 6² = 36
Therefore, the value of x² is 36.
(b) 5x + y:
To find 5x + y, we multiply the value of x by 5, and then add the value of y. Given that x = 6 and y = -2, we calculate:
5x + y = 5(6) + (-2) = 30 - 2 = 28
Therefore, the value of 5x + y is 28.
(c) x + y²:
To find x + y², we square the value of y, and then add the value of x. Given that x = 6 and y = -2, we calculate:
x + y² = 6 + (-2)² = 6 + 4 = 10
Therefore, the value of x + y² is 10.