Take a look at <span>y = mx^2 – 5x – 2. This is a quadratic equation with a=m, b= -5 and c= -2. What is the discriminant, b^2 - 4ac? (-5)^2 - 4(m)(-2).
There will be 2 complex roots if this discrim. is < 0. Thus, solve
25 + 8m < 0:
Subtr. 25 from both sides: 8m < -25
Div. both sides by 8: m < -25/8
Conclusion: If m is less than -25/8, there will be no real roots (and thus, no x-intercepts). </span>
Answer:
1) x=-1.5 , x=8 that is the answer
Answer:
1. the first one - (100-2)*24 = 2400 - 48 = 2352
2. third one - (20+1)*15=300+15
3. fourth one - (0.5+0.01)*40 = 20+0.4 = 20.4
Step-by-step explanation:
Answer:
x+6=9
Step-by-step explanation:
divide all by 5
