Question

1. if a=b and b=3 find the value of 5a²-2ab​

Answer 1

Answer:

5a^2 -2ab = 5 x 3^2 - 2 x 3 x 3 = 45-18 = 27

Step-by-step explanation:

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Answer 2

If b = 3 , then a = 3 [ given a = b ]

So , by putting the values of a and b in the eqn. we get ,

5a² - 2ab

→ 5(3)² - 2(3)(3)

→ 5(9) - 2(9)

→ 45 - 18

→ 27