Question

solve m²+20m+100=0 by formula Method​

Answer 1

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Answer 2

Given

• m² + 20m + 100 = 0

Solution

★Solve this by splitting middle term★

→ m² + 20m + 100 = 0

→ m² + 10m + 10m + 100 = 0

→ m(m + 10) + 10(m + 10) = 0

→ (m + 10)(m + 10) = 0

∴ m = - 10

Hence,

• Zero of the given polynomial is -10

Extra Information

• (a + b)² = a² + b² + 2ab
• (a - b)² = a² + b² - 2ab
• a² - b² = (a + b)(a - b)
• (a - b)³ = a³ - b³ - 3ab(a + b)