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1. factor the expression completely(show work) 9a^4 - 7a^2b^2 - 50b^4 I asked this question once already, but the answer is different when I check
1. factor the expression completely(show work) 9a^4 - 7a^2b^2 - 50b^4 I asked this question once already, but the answer is different when I check it online using algebra calculators. The answer I was given was (a^2+2b^2)(9a^2-25b^2), but 3 algebra calculators all answer (a^2+2b^2) (3a-5b) (3a+5b), but they don't show the work as to how they calculate this answer. Which anwer is right?? Please show the work if the right answer is the same as the algebra calculators. 2. Solve for each of the variables in the 3 equations(show work)(x,y and z are the same in all 3 equations) x = ?, y = ?, z = ? (3(x+3))/5 + y/2 + 2z = -1 x/3 + (5y-2)/4 + z = 0 x - (2(y+1))/3 - 3z = -2
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