Fill in the blanks Part 1: Find the value of m so that the quadratic equation mx (x – 7) + 49 = 0 has two equal roots. The value of m is……….. *
(A) 1
(B) 2
(C) 3
(D) 4
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Answer:
m=2. I guess..
Step-by-step explanation:
mx(x-7)+49=0
mx²-7mx+49=0
comparing the above equation with
ax²+bx+c=0, we get
a= 1 , b= (-7m) , c=49
b²-4ac = (-7m)² - 4× 1 × 49
49m²-196=0
m²=196/49
m²=4
taking square root
m = 2
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