The value of the given expression (a + b/2)/a - bx² = 219.5/(76 - 287x²).
An expression is the combination of variables, coefficients, and constants that are separated by an arithmetic operator(+, -, ...).
The given expression is
(a + b/2)/a - bx²
It is given that a = 76 and b = 287
On substituting,
(a + b/2)/a - bx² = (76 + 287/2)/76 - 287x²
⇒ (76 + 143.5)/76 - 287x²
⇒ 219.5/(76 - 287x²)
Therefore, the given expression for the values a = 76 and b = 287 is 219.5/(76 - 287x²).
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