Subtracting a positive is the same thing as adding a negative. Subtracting a negative is the same as adding a positive. Sometimes it's a little easier to do it that way.
1. 30 in
2. 40 in
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Your answer is 48, because 96/2 is 48
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Answer:
⇒ The given quadratic equation is x2−kx+9=0, comparing it with ax2+bx+c=0
∴ We get, a=1b=−k,c=9
⇒ It is given that roots are real and distinct.
∴ b2−4ac>0
⇒ (−k)2−4(1)(9)>0
⇒ k2−36>0
⇒ k2>36
⇒ k>6 or k<−6
∴ We can see values of k given in question are correct.
C.35cm
Should be the right answer