x2 + 8x − 9=? x2 + 15x + 56 =?x2 − 18x + 81 = 0 x1=? x2=?

x2 + 8x − 9=? x2 + 15x + 56 =?x2 − 18x + 81 = 0 x1=? x2=?


x^2+8x-9=(x-1)(x+9)
x1=1.,x2=-9
x^2+15x+56=(x+7)(x+8)
x1=-7,x2=-8
x^2-18x+81=(x-9)^2
x1=x2=9



√（36-x2）—5=√（25-x2）


36-x^2>=0
-6



It is known that the ellipse e: X2, 25 + Y2 / 36 = 1 point P (x, y) is a point on the ellipse E. find the maximum value of x2 + Y2 and the maximum value of X + y


x=5cos t y=6sin t
①X^2+Y^2=25cos^t+36sin^t=25+11sin^t
∵0

Elden Ring Premiere

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