385.If (x + a) is a factor of 2x2Â + 2ax + 5x + 10, find a.
Let f (x) = 2x2 + 2ax + 5x + 10 Since, (x + a) is a factor of f(x). ⇒ f(–a) = 0 ⇒ 2(– a)2 + 2a.(–a) + 5(–a) +10 = 0                                                          Ans.Â
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386.The graph of y = f (x) is given in Fig. How many zeroes are there of f (x)?
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387.The graph of y = p(x) is given below. Find the number of p(x).
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388.The graph of y = p (x) is given below. Find the number of zeroes of p(x).Â
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389.The grapn of y = p(x) is given below. Find the number of zeroes of p(x).Â