factorise: a^2 -10a+21
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Answered by
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a^2-10a+21
=>a^2-7x-3x+21
=>a(a-7)-3(a-7)
=>(a-3)(a-7)
a=3,7
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Answered by
1
Step-by-step explanation:
answer of this question is ㅤㅤ
(a-7)(a-3)
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