Question

What should be the value of b if 2y² + 3 + b = 15, when y = - 2​

Answer 1

Answer:

b=4

Step-by-step explanation:

I I hope this is helpful for you

Answer 2

Given:

We have this equation ---> 2y²+3+b = 15

And y = -2

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To find:

The value of b.

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Solution:

On substituting the value of y as (-2) in the equation,

2y²+3+b = 15

2×(-2)²+3+b = 15

2×4+3+b = 15

8+3+b = 15

11+b = 15

b = 15-11

$\bf \purple{b = 4}$

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Verification:

On substituting the value of b as 4 in the equation,

2×(-2)²+3+b = 15

2×4+3+4 = 15

8+7 = 15

15 = 15

LHS = RHS

Hence Verified!

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Final answer:

$\bf \red{The\: value\: of\: b\: is\: 4.}$