According to Pythagorean theorem, what is the equivalent of B & # 178; = 8 & # 178; - 4 & # 178;. B?

According to Pythagorean theorem, what is the equivalent of B & # 178; = 8 & # 178; - 4 & # 178;. B?

b=(8^2-4^2)^0.5=48^0.5=4*3^0.5=6.928

38.44-x & # 178; = 8 & # 178; - (3.8-x) &# 178; how much is x equal

38.44-x²=8²-（3.8-x）² (x-3.8)² -x² =8² -38.44x² -7.6x +14.44-x² =64-38.44-7.6x=25.56-14.44-7.6x=11.12x=-11.12÷7.6x=-279/190

Calculation (X & # 178; + X + 6) (X & # 178; - x + 6)
There is another (X & # 179; + 2) & # 178; - 2 (x + 2) (X-2) (X & # 178; + 4) - (X & # 178; - 2) & # 178;, where x = - 1 / 2

(x²+x+6)(x²-x+6)
=[(x²+6)+x][(x²+6)-x]
=(x²+6)²-x²
=x^4+12x²+36-x²
=x^4+11x²+36
(x³+2)²-2(x+2)(x-2)(x²+4)-(x²-2)²
=x^6+4x³+4-2(x²-4)(x²+4)-(x^4-4x²+4)
=x^6+4x³+4-2(x^4-16)-x^4+4x²-4
=x^6+4x³+4-2x^4+32-x^4+4x²-4
=x^6-3x^4+4x³+4x²+32
By substituting x = - 1 / 2, we get the following result:
Original formula = 1 / 64-3 × (1 / 16) + 4 × (- 1 / 8) + 4 × (1 / 4) + 32
=1/64-3/16-1/2+1+32
=32+21/64

What is the solution set of cosx = negative half root sign three

x=5π/6+2kπ x=7π/6+2kπ
K is an integer