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प्रश्न
Factorise:
a4 - 343a
योग
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उत्तर
a4 - 343a
= a(a3 - 73)
= a(a - 7)[(a)2 + a × 7 + (7)2] ...[∵ a3 - b3 = (a - b)(a2 + ab + b2)]
= a(a - 7)(a2 + 7a + 49)
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Method of Factorisation : the Sum Or Difference of Two Cubes
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संबंधित प्रश्न
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Show that : 133 - 53 is divisible by 8
Evaluate :
`[ 5.67 xx 5.67 xx 5.67 + 4.33 xx 4.33 xx 4.33 ]/[5.67 xx 5.67 - 5.67 xx 4.33 + 4.33 xx 4.33]`
