if x= –2 is a solution of a equation x² –2x + k then the value of k is ?
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Step-by-step explanation:
→ x = -2
→ x² - 2x + k
→ (-2)² - 2(-2) + k = 0
→ 4 - (-4) + k = 0
→ 4 + 4 + k = 0
→ 8 + k = 0
→ k = -8
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