4a² - 25, 4a² - 20a + 25 find HCF and LCM.
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Answer:
4 {a}^{2} - 20a + 25 = 4 {a }^{2} - 10a - 10a + 254a
2
−20a+25=4a
2
−10a−10a+25
=2a(2a-5)-5(2a-5)
=(2a-5)(2a-5)
Therefore 2a-5 is a factor of the given expression
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