Q. What is the value of the expression below when y=4 ?5y2−5y+5Answer:
Substitute y value: Substitute the value of y into the expression.We are given y=4, so we substitute 4 for y in the expression 5y2−5y+5.This gives us 5(4)2−5(4)+5.
Calculate 4 squared: Calculate the value of 4 squared.4 squared is 4×4, which equals 16.So, we now have 5(16)−5(4)+5.
Multiply and calculate: Multiply 5 by 16 and 5 by 4.\ Multiplying 5 by 16 gives us 80, and multiplying 5 by 4 gives us 20.\ So, the expression becomes 160.
Perform subtraction and addition: Perform the subtraction and addition.Subtract 20 from 80 to get 60, and then add 5 to get 65.So, the final value of the expression is 65.
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