Question

subract 5ab-6b2-4a2from 10a2-6b2-15ab​

Answer 1

$(10a^{2}-6b^{2}-15ab) -(5ab-6b^{2}-4a^{2} )$

=$10a^{2} -6b^{2}-15ab-5ab+6b^{2} +4a^{2}$

=$10a^{2}+4a^{2} -6b^{2} +6b^{2} -15ab-5ab$

=$14a^{2} -20ab$

14a^{2} -20ab is the answer