Math, asked by PragyaTbia, 1 year ago

दिलेलं वर्गसमीकरणांची सामान्य रूपाशी तुलना करून a,b,c च्या किमती लिहा: x² - 7x + 5 = 0

Answers

Answered by nain31
7
 \mathsf{On \: comparing \: the \: following \: quadractic \: equation \: by \: ax^{2} + bx + c}

 \mathsf{We \: get,}

 \boxed{a = 1}

 \boxed{b = -7}

 \boxed{c= 5}

 \mathsf{we \: know,}

 \boxed{x = \dfrac{-b \pm \sqrt{b^{2} + 4ac}}{2a}}

 \mathsf{x = \dfrac{-(-7)\pm \sqrt{(-7)^{2}+ 4 \times 1 \times 5}}{2 \times 1}}

 \mathsf{x = \dfrac{7\pm \sqrt{ 49 + 4 \times 1 \times 5}}{2}}

 \mathsf{x = \dfrac{7\pm \sqrt{49 + 20}}{2}}

 \mathsf{x = \dfrac{7 \pm \sqrt{ 69}}{2}}

 \mathsf{x = \dfrac{7\pm 8.30}{2}}

 \mathsf{So,}

 \mathsf{x = \dfrac{7+ 8.30}{2}}

 \mathsf{x = \dfrac{15.30}{2}}

 \boxed{\mathsf{x = 7.65}}

 \mathsf{x = \dfrac{7 - 8.30}{2}}

 \mathsf{x = \dfrac{-1.3}{2}}

 \boxed{\mathsf{x = -0.65}}
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