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pls help
1.show that x^2+hx+k=o has two distinct roots fer al;l negative valuse of k
2. find the values of k for which the x axis is a tangent to the curve y=3x^2-8x+5-k.For each value of k,find the coordiantes ffor the point of tangency.
3.Find the range of values of k for whch the equation x^2 +5x+3=k has two real and distinct roots
qn 3. i noe how to do but answer differnt from answer key so nid clarification
thks in advacne
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Originally posted by wishboy:4x^½ = 3 - 7x
Let x^½ be u
4u = 3 - 7u²
7u² + 4u - 3 = 0
(7u - 3)(u + 1) = 0
7u - 3 = 0 or u + 1 = 0
u = 3/7 or u = -1
x^½ = 3/7 or x^½ = -1
x = 9/49 or 1
FYI, x^½ is equals to "square root of x", written as "sqrt x"but hor y i sub 1 into the original equation 1 side is 4 the other side is -4 ?
liddat still can??
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!!!????
