7a²+7a -20 a =-4 please give give this answer
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Answer:
a = 10/7 {or} 3/7
Step-by-step explanation:
Given That,
=-4
=-4
=0
BY USING QUADRATIC EQUATION FORMULA, WE GET,
= ( -b ±√[( -4ac)])/ 2a
Here,a=7 b= -13 c= 4,
a = (+13 ±√[(-4 ×7×4)])/ 2×7
a = ( 13± √[169-112])/ 14
a = (13±√[49])/ 14
a = (13±7)/ 14
a = (13+7)/14 {or} (13-7)/14
a= 20/14 {or} 6/14
a = 10/7 {or} 3/7
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