Question

(iv) 4m2 - 25 and 4m2 +20m + 25
find LCM ​

Answer 1

Answer:

Find value of k.

2x

2

+kx−5=0 & x

2

−3x−4=0

→x

2

−3x−4=0

x

2

−4x+x−4=0

x(x−4)+1(x−4)=0

(x+1)(x−4)=0

x=−1 and x=4

→ one root is common

∴2(−1)

2

+k(−1)−5=0

∴2−k−5=0

∴k=−3

Or

2(4)

2

+k(4)−5=0

∴32+4k−5=0

∴k=

4

−27

Step-by-step explanation:

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