Question

some problems on identity X + a Into X + b is equals to X square + a + b into X + ab​

Answer 1

$\huge\bold{\red{Answer}}$

$</p><p>\\ \sf (x+a)(x+b)=x{}^{2}+a+b×x+ab\\ \sf x(x+b)+a(x+b)=x{}^{2}+a+b×x+ab\\ \sf x{}^{2}+xb+ax+ab=x{}^{2}+a+b×x+ab\\ \sf x{}^{2}+(b+a)x+ab=x{}^{2}+a+b×x+ab\\ \sf x{}^{2}+a+b×x+ab=x{}^{2}+a+b×x+ab$