Question Simplify the expression −at2b−21a2t−2b2t Evaluate −atbt−21a2t−2b2tSolution −at2b−21a2t−2b2t Show Solution Factor the expression −21t(2atb+a2+4b2) Evaluate −atbt−21a2t−2b2tMultiply the terms −at2b−21a2t−2b2tCalculate −t2ab−21ta2−2tb2Rewrite the expression −21t×2atb−21ta2−21t×4b2Solution −21t(2atb+a2+4b2) Show Solution