Question

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Answer 1

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