( 2+a)²-2×b

a=3; b=5

(2+3)² - 2×5

(5)² - 2×5

25 - 2×5

25 - 10

15

Answer:

15

refer to the photo above

Step-by-step explanation:

substitute the value of a and b in the equation then...

add first the numbers inside the parenthesis

then square 5

multiply 2 and 5

then finally

subtract

25-10

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