64-112d+49d2 factorisation
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Answer:
(7d - 8)²
Step-by-step explanation:
==: 49d² - 112d + 64 = 0
==: 49d² - 56d - 56d + 64 = 0
==: 7d (7d - 8) - 8 (7d - 8) = 0
==: (7d - 8) (7d - 8) = 0
==: (7d - 8)² = 0
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used quadratic formula
a=49 b=-122 c=24
-122+-(7840)square root ,divide by 98
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