64. If x + x = 19, then what is the value of
(x + 5)2 + x+52?
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Answer:
(x+5)2+(1x+5)2=
x2+10x+25+(1x2+10x+25)=
19+9x+25+(119+9x+25)=
9x+44+(19x+44)=
81x2+792x+1936+19x+44=
81x2+81x+711x+19379x+44=
81∗19+711x+19379x+44=
79(44+9x)9x+44=
79
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