Answer:
first option
Explanation:
given
x² + 2x - 3 - 2x² + x + 4 ( collect like terms )
= (x² - 2x² ) + (2x + x) + (- 3 + 4)
= - x² + 3x + 1 ← substitute x = 3 into the expression
= - (3)² + 3(3) + 1
= - 9 + 9 + 1
= 0 + 1
= 1
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