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layla07
11.05.2021 •
Mathematics
I need all the angles of all four please, I uploaded them in order of each question
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Ответ:
Step-by-step explanation: I uploaded the answer here. Good luck!
Ответ:
Step-by-step explanation:
to understand thisyou need to know about:factoringPEMDAStips and formulas:quadratic expression:ax²+bx+cfactoring quadratic:
Find two numbers that multiply to give ac, and add to give brewrite the middle with those numbersfactor out common termsgrouplet's solve:a is 3 and b is -7
therefore
now we need to find two numbers that give -21
to do so we need to find the factors of 21
which are
likewise,
in this case we can take any two numbers from negative and positive factors that give us -21 and -4
3 and -7 are the two numbers that multiply to give -21 (3×-7=-21) and add to give -4. (3+(-7)=-4)
now let's factor: