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| 1. |
Solve the quadratic equation 3xsq.-243=0 |
| Answer» 3x^2-243=0X^2-81=0X^2-9^2=0(a^2-b^2)=(a-b)(a+b)(X-9)(x+9)=0x-9=0,x+9=0x=9,x=-9 | |