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OpenStudy (anonymous):
What is the value of b2 - 4ac for the following equation? 5x2 + 7x = 6 9 81 169
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jhonyy9 (jhonyy9):
so than b=7 a=5 and c=-6 can you calculi it now ?
OpenStudy (anonymous):
7^2-(4*5*-6)=169
jhonyy9 (jhonyy9):
so b^2 = 49 -4ac=-4*5*(-6)=-20(-6)=120 120!49=169
jhonyy9 (jhonyy9):
sorry 120+49=169
OpenStudy (anonymous):
I have another one. 2X^2-2x-1=0
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