Math question 2) x²-7x - 30.=0
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Answer:
x=10,−3
Explanation:
The key realization is that we need to think of two numbers that sum up to the middle term (−7) and have a product of the last term (−30).
After some trial and error, we arrive at
−10 and 3. This means we can factor the expression as
(x−10)(x+3)=0
Lastly, we just set both factors to zero to get
x=10,−3
Hope this help you guys !!!
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