Question

3x²-kx+48=0 find the value of k

Answer 1

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compare \: given \: quadratic \: equation

ax² + bx + c = 0 ,withax²+bx+c=0,

a = 3 , b = - k√3 , c = 4a=3,b=−k√3,c=4

b² = 4ac b²=4ac

( - k√3 )² = 4 × 3 × 4(−k√3)²=4 ×3 ×4

k² × 3 = 4 ×3 × 4k²×3=4 ×3 ×4

k² = 4 × 4k²=4 ×4

k = √ 4 × 4k= √4 ×4

k = 4 or k = -4 k=4ork=−4