factorise:1/35+12/35a+a2
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Answer:
a=-1/5 or -1/7
Step-by-step explanation:
A² + 12/35 a + 1/35 = 0
a² + 1/7a + 1/5 a + 1/35 = 0
a ( a + 1/7 ) + 1/5 ( a + 1/7 ) = 0
( a + 1/7 ) ( a + 1/5 )=0
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