Question

2x^-11x+5 find the zeroes of quadratic polynomial
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Answer 1

f(x) = 2x2 ˗ 11x + 15  

= 2x2 ˗ (6x + 5x) + 15  

= 2x2 ˗ 6x ˗ 5x + 15  

= 2x (x ˗ 3) ˗ 5 (x ˗ 3)  

= (2x ˗ 5) (x ˗ 3)  

∴ f(x) = 0 ⇒ (2x ˗ 5) (x ˗ 3) = 0  

⇒ 2x ˗ 5= 0 or x ˗ 3 = 0  

⇒ x = 5/ 2 or x = 3  

So, the zeroes of f(x) are 5/ 2 and 3.

Answer 2

Answer:

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