Question Solve the quadratic equation Solve using square roots Solve by factoring Solve using the quadratic formula Load more c1=−420,c2=420 Evaluate 282×152=c2Multiply the numbers More Steps Evaluate 282×152Multiply the terms with equal exponents by multiplying their bases (28×15)2Multiply the numbers 4202 4202=c2Swap the sides c2=4202Take the root of both sides of the equation and remember to use both positive and negative roots c=±4202Simplify the expression c=±420Separate the equation into 2 possible cases c=420c=−420Solution c1=−420,c2=420 Show Solution Graph