Yothu-22
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Step-by-step explanation:
The given expression −x
2
+3x+40 can be factorised as follows:
−x
2
+3x+40=−x
2
+8x−5x+40=−x(x−8)−5(x−8)=(−x−5)(x−8)=(x+5)(8−x)
Hence, −x
2
+3x+40=(x+5)(8−x)
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