(3х-2)(3х+2)-(1+х)(х-1) = 9х² - 4 -(х+1)(х-1)= 9х² - 4 - (х² - 1) = 9х² - 4 - х² + 1 = 8х² - 3
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(3х-2)(3х+2)-(1+х)(х-1) = 9х² - 4 -(х+1)(х-1)= 9х² - 4 - (х² - 1) = 9х² - 4 - х² + 1 = 8х² - 3