Question

polynomial 7x⁴+3x²-4, when x = -2 is ____​

Answer 1

Answer:

64 is the answer on substituting -2.

Answer 2

▩ Solution :-

Given Equation :- $\tt p(x)→7{x}^{4} + 3{x}^{2} - 4$

➸ Putting x = - 2

$\tt p( - 2)→7{( - 2)}^{4} + 3{( - 2)}^{2} - 4$

$\tt p( - 2)→7(16) + 3(4) - 4$

$\tt p( - 2)→112 + 12 - 4$

$\tt p( - 2)→120$

Hence, polynomial 7x⁴ + 3x² - 4, when x = -2 is equal to 120.