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DiKsa [7]
3 years ago
10

Plz help me i dont know the answer and i cant figure it out

Mathematics
2 answers:
ryzh [129]3 years ago
8 0
Hey! it’s c! great job :))) you have the answer correct
Fittoniya [83]3 years ago
5 0
It’s c btw you got it right
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5. Given that a + b = 8 and ab = 15, find the value of (a+b)² and a² + b²​
Maksim231197 [3]

Answer:

64 and 34

Step-by-step explanation:

Given

a + b = 8 ( square both sides )

(a + b)² = 8² = 64

------------------------------------------------

(a + b)² = 64 ← expand left side

a² + b² + 2ab = 64 ← substitute ab = 15

a² + b² + 2(15) = 64

a² + b² + 30 = 64 ( subtract 30 from both sides )

a² + b² = 34

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3 years ago
max and his friend eke are comparing their ages. They figure out that if they double max's age from 3 years ago and add it to ze
Lapatulllka [165]

Answer:

Max is currently 12 years old.

Step-by-step explanation:

Zeke's current age = 8 years

Lets take Max's current age as x years.

Then Max's age 3 years ago = x-3

Double Max's age 3 years ago = 2*(x-3)

Double Max's age 3 years ago + Zee's current age = 26

⇒ 2*(x-3) + 8 = 26

=2*(x-3)+8=26

=2x-6+8=26 (Simplifying the brackets)

=2x+2=26

=2x+2-2=26-22x=24=x=12

So Max's current age is 12 years.


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