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If x = 10, then find the value of (4x^2 + 20x + 25).  A. 256  B. 425  C. 625  D. 575

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If x = 10, then find the value of (4x2 + 20x + 25). 

A. 256 

B. 425 

C. 625 

D. 575

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1 Answer

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Best answer

(4x2 + 20x + 25) 

By using (a + b)2 = a2 + b2 + 2ab, 

We get; 

= (2x)2 + (5)2 + 2(2x)(5) 

= (2x + 5)2 

= (2(10) + 5)2 

= (20 + 5)2 

= (25)2 

= 625

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