Question

a^2-3a+4;a^2-1,a^2+5a+4
can anyone send this question answer??​

Answer 1

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• a² - 3a + 4 = 0

—» a² + a - 4a + 4 = 0

—» a( a + 1 ) -4( a + 1 ) = 0

—» ( a - 4 )( a + 1 ) = 0

a = 4 , -1

• a² - 1 = 0

—» a² = 1

—» a = 1 , -1 .

• a² + 5a + 4 = 0

a² + a + 4a + 4 = 0

a( a + 1 ) 4( a + 1 ) = 0

( a + 4 )( a + 1 ) = 0

a = -4,-1