1 Answers
x+3=-3
x+2=-2
put value of x=-2. subtracting
x4+ax3-7x2+8x+b=0. iifrom i
16+(-8a)-7×4+(-16)+b=0 -8a+b=28
16-8a-28-16+b=0 (16and-16=0) -27a+b=6
-8a+b=28 + - -
put x=-3 like first u get b and -b =0
81-27a-63-24+b=0. (opposite sine)
81-27a -87+b=0 19a=22=a=22/19
-27a+b=87-81 (b=708/19 as you put value
-27a+b=6 (of a in equation either i or ii)
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