3 years ago

Which expression is equivalent to 0.4 − (−0.7)?

Mathematics

1 answer:

Pani-rosa [81]3 years ago

6 0

0.4 + 0.7 because a - and a - equal a plus

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X ² + x -24=0<br> factor that exact problem to answer a factoring solving problem

Ket [755]

Answer:

Step-by-step explanation:

x²+x-24=0

x²+x+1/4-1/4=24

x^2+x+1/4=1/4+24

$(x+\frac{1}{2})^2=\frac{1}{4}+24=\frac{1+96}{4}=(\frac{\sqrt{97} }{2})^2\\x+\frac{1}{2} =\pm \frac{\sqrt{97} }{2} \\either ~x+\frac{1}{2}=\frac{\sqrt{97} }{2} \\so~x+\frac{1-\sqrt{97}}{2}=0\\ or~x+\frac{1}{2} =-\frac{\sqrt{97} }{2} \\or~x+\frac{1+\sqrt{97}}{2}=0\\ Hence~ x^2-x-24=(x+\frac{1+\sqrt{97} }{2})(x+\frac{1-\sqrt{97} }{2})$