For what values of x is x2 + 2x = 24 true?
2 answers:
X² + 2x = 24 Organizing: x² + 2x - 24 = 0 <<<< (<em>Quadratic </em><span><span><em>equation</em>) </span> </span><span>Delta: </span>Δ = b²<span> - 4.a.c </span> Δ = 2²<span> - 4 * 1 * -24 </span> <span>Δ = 4 - 4 * 1 * -24 </span> Δ = 100 <span>Bhaskara: </span><span>x = (-b +- √Δ)/2*a </span> x' = (-2 + √100)/2*1 x' = 8 / 2 x' = 4 x'' = (-2 - √100)/2*1 x'' = -12 / 2 x'' = -6Result: x = 4 or<span> x = - 6 . </span> Good studies! :)
X²+2x=24 Subtract 24 to each side x²+2x-24=24-24 x²+2x-24=0 Factor thus with ax²+mx+nx+b 0=x²+6x-4x-24 0=x(x+6)-4(x+6) 0=(x-4)(x+6) x-4=0 Add 4 to each side x-4+4=0+4 x=4 x+6=0 Subtract 6 to each side x+6-6=0-6 x=-6. As a result, x could equal to 4 and -6. Hope it help!
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if the length is 8ft and the width is (7+x) then the area would be 56+8x, if x is unknown.
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Step-by-step explanation:
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Step-by-step explanation:
sorry I don't now but when I now I will tell you ok but mybe it 12×12×12
Answer:
P(A)=0.55
P(A and B)=P(A∩B)=0.1265
P(A or B)=P(A∪B)=0.7635
P(A|B)=0.3721
Step-by-step explanation:
P(A')=0.45
P(A)=1-0.45=0.55
P(B∩A)=?
P(B|A)=0.23
P(B|A)=(P(A∩B))/P(A)
0.23=(P(A∩B))/0.55
P(A∩B)=0.23×0.55=0.1265
P(A∪B)=P(A)+P(B)-P(A∩B)
=0.55+0.34-0.1265
=0.7635
P(A|B)=[P(A∩B)]/P(B)=0.1265/0.34 ≈0.3721