Final answer:
To evaluate expressions for given values of x and y
Step-by-step explanation:
To evaluate the expression 3x² - 10x for x = -5, we substitute -5 in place of x in the expression:
3(-5)² - 10(-5)
= 3(25) + 50
= 75 + 50
= 125
Therefore, when x = -5, the value of the expression 3x² - 10x is 125.
To evaluate the expression 2xy + ly| for x = 3 and y = -4, we substitute 3 in place of x and -4 in place of y in the expression:
2(3)(-4) + l3(-4)l
= -24 + l(-12)l
= -24 + 12
= -12
Therefore, when x = 3 and y = -4, the value of the expression 2xy + ly| is -12.
Learn more about Evaluating Expressions