1.

( x - 7 ) ( x - 9 ) = 195

Answer»

(x-7)(x-9)=195x²-7x-9x+63=195x²-16x+63-195=0x²-16x-132=0x²-22x+6x-132=0x(x-22)+6(x-22)=0(x-22)(x+6)=0x=22,-6



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