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1. If x=5 and y = -2, what is the value of x² + 3y?

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Sagot :

x² + 3y

= 5² + 3(-2)

= 25 + (-6)

= 19

The answer is 19.

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Answer:

19 (if it is x=5)

Though, (if it is really, x-5) then x-5= -5+√6

Step-by-step explanation:

*x=5; y=-2

x²+3y=0

5²+3(-2)=0 [substitute the given value of x and y]

25 + (-6) = 19

*x-5; y=-2

x²+3y=0

x²+3(-2)=0 [substitute the given value of x and y]

x²+ (-6)=0

x²= 6 [transpost]

x=√6, since x-5=0 then substitute so, √6 -5. Answer is -5+√6