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puteri [66]
3 years ago
13

Which expression is equivalent to (5x + 2) + (4.x - 3)?

Mathematics
1 answer:
Naddik [55]3 years ago
3 0

Answer:

Step-by-step explanation:

3

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Solve equation by factoring.
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Hi ;-)

x^2+6x-10=30 \ \ /-30\\\\x^2+6x-40=0\\\\a=1, \ b=6, \ c=-40\\\\\Delta=b^2-4ac=6^2-4\cdot1\cdot(-40)=36+160=196\\\\\sqrt{\Delta}=\sqrt{196}=14\\\\x_1=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-6-14}{2}=\boxed{-10}\\\\x_2=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-6+14}{2}=\boxed4

8 0
3 years ago
(25)2×100÷23+[24÷(13−5)]
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Step-by-step explanation:

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